Why does body temperature rise during illness?

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Why does the temperature rise during illness?

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High body temperature without signs of a cold in an adult

A rise in temperature in an adult who is feeling well, without a hint of a cold or symptoms of an infectious disease of the genitourinary system or intestines, is frightening and alarming.

Most often, without the appearance of cold symptoms, the temperature rises in both adults and children due to a respiratory infection or flu. However, if the fever lasts not 3-4 days, but several weeks, then such a condition cannot be caused by a common cold or even the flu, and it cannot be ignored.

Normal temperature

The range of normal body temperature for an adult is considered to be 36 – 37.5 °C, with an average value of 36.6 °C. These indicators correspond to measurements in the armpit.

  • For the oral cavity, the temperature norm is 37 °C;
  • When measured rectally or in the ear - 37.5 °C.

In Russia, temperature is measured in the armpit; all other measurement methods are specified specifically.

Body temperature is regulated by the thermoregulation center in the hypothalamus of the brain. The brain center reacts to the appearance of protein substances pyrogens in the blood, which are:

  • exogenous (external) - bacterial toxins that are released by viruses and bacteria into the blood;
  • endogenous - compounds that are produced by the body:
    • cytokine proteins - interleukins IL 1 (alpha and beta), IL 6, interferon alpha;
    • immune complexes;
    • breakdown products of the blood complement system;
    • hormone breakdown products;
    • bile acids.

The most powerful provocateurs of fever are the alpha and beta varieties of interleukin IL 1. These proteins are produced not only by cells of the immune system in response to infection during a cold, but also by cells of the liver, epidermis, and glia - protective cells of the brain.

It is possible to determine what caused the increase in temperature in the absence of signs of a cold by the nature of the daily temperature change.

Temperature characteristics

A person’s condition depends on the degree of increase in body temperature. There are 4 elevated temperature ranges (°C):

  • low-grade fever – range of values ​​37.1 – 38;
  • febrile – meanings are called febrile;
  • pyretic range or fever – 39 – 41;
  • hyperpyretic – above 41.

The temperature that is lethally elevated for the brain is 42 °C.

When the body temperature rises to 37 - 38 °C without signs of a cold, then it is worth paying attention to what time of day the fever develops.

Low-grade fever in the evening may indicate a developing infection:

Fever in the morning indicates the possibility of brucellosis. An undulating course of fever, with a gradual rise and several days of fever, is characteristic of typhoid fever and lymphogranulomatosis.

Sharp fluctuations in the readings on the thermometer - within 2 - 3 degrees within one day - may indicate the presence of a purulent focus of infection in the body. Daily temperature fluctuations are observed during malaria.

Changes in indicators of 1 – 1.5 °C are observed during the day with focal pneumonia. This type of fever without obvious signs of pneumonia can last for weeks.

Reasons for rising temperature

Elevated body temperature without the appearance of signs of a cold is observed in adults in the first days of the development of ARVI. Symptoms of a respiratory infection often appear later than the rise in temperature, following the development of a fever.

If, on the 2nd - 3rd day, other cold symptoms do not accompany the elevated temperature, then the causes of a febrile state in an adult may be a wide variety of inflammatory, infectious, immune, and autoimmune diseases.

Temperature 37 in adults

The most common deviation is 37 °C – 38 °C. The cause of elevated body temperature to subfebrile levels in adults without signs of a cold is most often:

  • early stage of infection, occurring against the background of reduced immunity;
  • chronic sluggish ENT diseases, lower respiratory tract infections - sinusitis, tonsillitis, laryngitis, tracheitis, otitis media, bronchitis, pneumonia;
  • inflammatory diseases - liver, heart, bile ducts, pancreas, kidneys, bladder;
  • dental diseases - granuloma in the apical region of the tooth root, detected only radiographically;
  • allergic diseases - urticaria, atopic dermatitis, food allergies;
  • autoimmune diseases - arthritis, systemic lupus erythematosus, vasculitis;
  • porphyria – liver pathology accompanied by impaired hemoglobin synthesis;
  • endocrine disorders - hyperthyroidism, diabetes;
  • non-infectious myositis;
  • infections:
    • tuberculosis – pulmonary and non-pulmonary forms;
    • genital herpes;
    • Infectious mononucleosis;
    • cytomegalovirus infection;
    • brucellosis;
    • syphilis;
    • viral hepatitis;
    • typhus;
  • helminthiases – infection with lamblia, roundworms, pinworms;
  • disorder of the autonomic nervous system – thermoneurosis;
  • physical fatigue;
  • hypothermia;
  • injury;
  • treatment with antidepressants, antibiotics, painkillers, and a number of diuretics;
  • among women:
    • pregnancy period;
    • time from the days of ovulation and sometimes until the end of the menstrual cycle;
    • menopause;
  • tumors are malignant, benign – periods of elevated temperature are observed.

Weak immune reactivity in the elderly or in people with immunodeficiency can lead to the fact that even acute infections such as pneumonia do not cause a significant rise in temperature. They occur with low-grade fever without the appearance of other symptoms.

Long-term elevated temperatures to subfebrile values ​​of 37–38 °C without cold symptoms may be the only sign of a malfunction of the thyroid gland and the development of symptoms of hyperthyroidism.

Body temperature above 37 °C, but less than 38 °C with chills, but without runny nose, cough or other signs of a cold, is observed in adults with chronic bacterial pyelonephritis. Chronic kidney disease, when exacerbated, can cause fever and even fever up to 40 °C.

Without signs of a cold, without the manifestation of symptoms of any pathology, the temperature elevated to 37 - 38 ° C for a long time, caused by thermoneurosis - a nervous disorder that occurs as a result of vegetative-vascular imbalance.

A sign that the fever is caused by thermoneurosis is the lack of reaction of the body to taking aspirin. This medicine blocks the production of inflammatory factors, and in thermoneurosis, the focus of the inflammatory reaction, as such, is absent.

Fever with anemia

Low-grade fever in adults without signs of other diseases or colds is a common manifestation of B-12 deficiency, iron deficiency forms of anemia.

Anemia is a common disease in the world, accompanied by a decrease in hemoglobin in the blood, and is found according to statistics:

  • iron deficiency - in 40% of the world's population;
  • B-12 deficiency - in 20% of adults.

Anemia, and the resulting fever without signs of a cold or symptoms of a serious illness, occurs in pregnant women, especially if:

  • the expectant mother smokes;
  • less than 3 years have passed since the last pregnancy;
  • multiple pregnancy;
  • the mother is one of those who give birth frequently;
  • a woman engages in heavy physical labor or sports during pregnancy.

In addition to low-grade fever, symptoms of B-12 deficiency anemia are indicated by:

  • puffy face;
  • pale skin;
  • smoothed tongue papillae.

Some types of anemia may cause fever. Fever up to 38 °C with chills is observed with hemolytic anemia. Associated symptoms are:

  • yellowness of the sclera, skin;
  • dark urine;
  • increase in the size of the spleen.

Low-grade fever with vasculitis

Without accompanying symptoms, an elevated temperature may be observed for a long time due to vasculitis, an autoimmune disease in which the immune system destroys its own blood vessels.

The temperature rises above 37 °C with vasculitis:

  • allergic – rashes appear on the skin, headaches, inflammation of the joints are noted;
  • urticaria - skin rashes are similar to urticaria, but these symptoms last longer and leave behind bruises, the kidneys, joints, and digestive system are affected;
  • hemorrhagic - pinpoint hemorrhages appear on the bends of the elbows and knees, weakness and abdominal pain are possible;
  • periarteritis nodosa – accompanied by severe weight loss, which in some cases suggests a malignant disease.

A common symptom for all types of vasculitis is the absence of a decrease in temperature when taking an antibiotic. Low-grade fever with vasculitis persists even after using an antibacterial agent.

Fever up to 38 – 39 °C in adults

Body temperature can rise to 38 °C without signs of a cold in the following cases:

  • neuralgia – trigeminal neuritis, facial, intercostal neuralgia;
  • tonsillitis;
  • autoimmune pathologies – Takayasu’s disease;
  • tumors;
  • febrile schizophrenia;
  • overheating;
  • alcohol poisoning;
  • allergic reaction;
  • chronic liver and lung diseases.

Body temperature elevated to 38 °C may indicate inflammation of the nervous tissue, developing myocardial infarction in adults, indicate an inflammatory process in the tissues of the heart muscle, and disruption of nerve conduction.

Fever with temperatures elevated to 39 °C is observed in febrile schizophrenia. This disease is hereditary. It can be provoked by:

Fever in febrile schizophrenia develops suddenly, against the background of physical health, without signs of a cold or illness at all. Accompanied by mental disorder:

  • confusion;
  • stupor, freezing of the patient in a static position;
  • refusal to eat.

A persistent increase to 38.5 °C in adults is observed in the case of:

  • cancer;
  • endocrine diseases.

Takayasu's disease

Severe fever is observed in Takayasu disease, an autoimmune vasculitis that occurs more often in young people. The disease is caused by an autoimmune lesion of the aorta, and at first it does not manifest itself with any specific symptoms.

The first signs of the disease are an increase in temperature to 38 °C without cold symptoms, aches and pain in the joints, sometimes in the muscles, throughout the body, and sleep disturbances.

The disease is accompanied by anemia and high ESR. Without treatment, it progresses, complicated by vascular disorders. Takayasu's disease is treated with prednisolone and heparin. The life prognosis with timely diagnosis is good.

Fever above 39°C in adults

Meningococcal encephalitis begins in adults with pyretic fever without signs of a cold and high temperatures exceeding 39 °C. The disease can be caused by a tick bite, which introduces the virus into the blood.

The disease begins with a sharply elevated temperature, body aches, especially in the calves and lower back. The patient develops a headache, but no signs of a cold, and vomiting without other symptoms of food poisoning.

Signs of the disease, in addition to elevated temperature, are:

  • disturbance of consciousness;
  • the appearance of auditory and visual hallucinations;
  • delusional disorders;
  • signs of depression.

Up to 40 °C without signs of a cold, fever may develop due to diseases:

  • infective endocarditis;
  • osteomyelitis;
  • chronic pyelonephritis;
  • hypothalamic syndrome.

With hypothalamic syndrome, fever without signs of a cold remains at 38–39 °C, jumping during periods of deterioration of the patient’s condition to 39–40 °C. The disease is associated with a violation of thermoregulation; it is characterized by increased temperature values ​​in the morning and lack of response to taking aspirin.

Osteomyelitis begins with a fever of 39–40 °C without signs of a cold in adults. With this disease, endotoxins are released into the blood, even a small amount of which causes severe fever.

If a purulent process in bone tissue develops in a small area, then the body temperature may not reach 39 °C. Exceeding this indicator indicates developing toxic damage to the body.

High body temperature without signs of a cold in an adult

Lump behind the ear in an adult

Runny nose in a nursing mother, treatment with drops and folk remedies

Signs and treatment of sinusitis in adults

Inexpensive drops for runny nose

Treatment of laryngitis in adults at home

By self-medicating, you can waste time and harm your health!

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Source: http://loramed.ru/bolezni/prostuda/temperatura-bez-simptomov-prostudyi-u-vzroslogo.html

Why does the temperature rise?

There is hardly a single person who has never had a fever. As a rule, it (high body temperature, fever, hyperthermia) is considered a manifestation of a cold. However, this is not always true.

The temperature, as a rule, rises under the influence of special substances - pyrogens. They can be produced either by our own immune cells or be waste products of various pathogens.

The exact role of hyperthermia in fighting infection has not yet been established. It is believed that at elevated body temperatures, protective reactions are activated in the body. But everything is good in moderation - if the thermometer shows degrees Celsius, then the need of organs and tissues for oxygen and nutrients increases significantly, and, consequently, the load on the heart and lungs increases. Therefore, if the body temperature goes beyond 38 degrees, it is recommended to take antipyretic drugs, and if this same fever is poorly tolerated (tachycardia or shortness of breath occurs), then at a lower temperature.

Reasons for rising temperature

If an increase in body temperature is accompanied by a runny nose, sore throat, or cough, questions about its cause probably will not arise. It is clear that you have become a victim of an acute respiratory viral infection (ARVI), and in the coming days you will have to lie under a blanket, armed with a handkerchief and hot tea.

While ARVI is the most common cause of fever in cold latitudes, in the southern countries the palm belongs to intestinal infections. With them, an increase in body temperature occurs against the background of typical gastrointestinal disorders - nausea, vomiting, diarrhea and bloating.

Body temperature can increase significantly with an overdose or intolerance to certain medications (anaesthetics, psychostimulants, antidepressants, salicylates, etc.) and in case of poisoning with toxic substances (cocadinitrocresol, dinitrophenol, etc.) acting on the hypothalamus - the part of the brain where the temperature center is located. regulation. This condition is called malignant hyperthermia.

Sometimes it is caused by congenital or acquired diseases of the hypothalamus.

It happens that in the summer, after spending several hours in the sun, or in the winter, after steaming in a bathhouse, you feel a headache and aches throughout your body. The thermometer will show 37 degrees with tenths. In this case, fever indicates general overheating.

The best thing to do is take a cool shower and lie down in a well-ventilated area. If the temperature has not decreased in the evening or has exceeded 38 degrees Celsius, this indicates serious heat stroke. In this case, medical assistance is necessary.

Sometimes fever is psychogenic, that is, it can arise from certain experiences and fears. Most often it occurs in children with an excitable nervous system after an infection. If this condition is detected, parents need to show their child to a pediatric psychoneurologist.

If, after hypothermia or an acute respiratory viral infection, shortness of breath appears, the temperature rises, and at night your underwear becomes wet from sweat, a visit to the doctor is necessary - most likely, you have “earned” pneumonia (pneumonia). The doctor’s phonendoscope and X-ray machine will clarify the diagnosis, and it is best to be treated in the pulmonology department of the hospital - pneumonia is not to be trifled with.

If, simultaneously with a rise in temperature, a sharp pain in the abdomen appears, do not delay calling the emergency medical service. In such a situation, there is a high probability of acute surgical disease (appendicitis, cholecystitis, pancreatitis, etc.), and only timely surgery will help avoid disastrous consequences.

Particular attention should be paid to fever that appears during or immediately after a visit to one of the warm countries. It may be the first sign indicating that you have caught some exotic infection, for example, typhus, encephalitis, hemorrhagic fever. And the most common cause of fever among travelers is malaria - a serious but completely curable disease. The main thing is to contact an infectious disease specialist in time.

Prolonged fever

It happens that low-grade (37-38 degrees) fever lasts for weeks or even months. This condition requires careful diagnosis.

Fever of infectious nature

The cause of a prolonged increase in temperature can be a chronic viral, bacterial, parasitic or fungal infection - infectious mononucleosis, toxoplasmosis, syphilis and many others. Prolonged fever often occurs with tuberculosis and foci of chronic infections.

If prolonged fever is accompanied by enlarged lymph nodes, weight loss, and unstable stools, this may be a sign of dangerous diseases such as HIV infection or malignant neoplasm. Therefore, all patients with long-term fever are prescribed an HIV antibody test and a consultation with an oncologist - there is no such thing as excessive vigilance in relation to such diseases.

Fever of non-infectious nature

A prolonged rise in temperature also accompanies autoimmune diseases, such as rheumatoid arthritis. However, fever is not the first thing such patients complain about.

It happens that the endocrine system is “responsible” for long-term fever. Most often, the thyroid gland is the culprit if it produces excessive amounts of hormones. This condition is called thyrotoxicosis, and in addition to elevated body temperature, it is characterized by weight loss, tachycardia, extrasystole, irritability and (over time) characteristic bulging eyes (exophthalmos). An endocrinologist will help you cope with this.

These are just the most common causes of hyperthermia, but the list could go on. So if you feel unwell, use a thermometer - perhaps it will help you find out about a health problem in time and take appropriate measures.

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Source: http://medportal.ru/budzdorova/health/otchego-povyshayetsya-temperatura/

What causes the temperature to rise during illness?

There are substances that, when released into the bloodstream, cause a chain of reactions leading to an increase in body temperature and a change in thermoregulation processes in the body. This condition is called fever, and the substances that cause it are called pyrogens (from the Greek pyros - fire, heat, and genes - generating, producing).

Pyrogens are endogenous (produced in the body) and exogenous (entering the body from the outside). Exogenous pyrogens are components of the cell membrane of microbes, as well as toxins and waste products of these microbes. Exogenous pyrogens do not cause an increase in body temperature on their own, but indirectly, causing the formation of endogenous pyrogens.

Endogenous pyrogens are formed in lymphocytes (mainly monocytes and macrophages). These include interleukins, interferons, breakdown products of steroid hormones, cytokines and other substances.

Endogenous pyrogens, in turn, affect body temperature by affecting the thermoregulation center in the hypothalamus, a part of the brain. Under the influence of pyrogens, the hypothalamus begins to perceive normal body temperature as lower, and the point of constant temperature maintained by the body shifts upward. This occurs by changing the ratio of heat production and heat transfer. It is interesting that in an adult, heat transfer decreases, and in newborns, in whom thermoregulation processes have not yet been “adjusted,” on the contrary, heat production increases. The first method is much more profitable, since it does not require increased energy expenditure: the body simply begins to give off less heat to the external environment. This is achieved by constricting peripheral blood vessels, reducing blood flow to peripheral tissues and reducing sweating. The skin turns pale and the skin temperature drops. As a result, we feel chills - a feeling of cold: this triggers receptors that react to cold and send a signal to the hypothalamus. The hypothalamus, in turn, sends a signal to the cerebral cortex, which is responsible for our conscious behavior. When experiencing chills, we try to move less, wrap ourselves up, and thereby further reduce heat transfer. In addition, when we have a chill, we begin to tremble. Shivering is small muscle contractions that also raise your body temperature.

Having thus raised the body temperature to a new set point, the body maintains it: heat production and heat transfer balance each other, and no further increase in temperature occurs. And thermoregulation occurs according to the same mechanisms that operate normally. At the same time, the skin vessels dilate, pallor, trembling and chills disappear, and the skin becomes hot to the touch. We begin to experience a feeling of heat .

The elevated temperature persists as long as endogenous pyrogens remain in the body or until we artificially lower the temperature with medications or other means. After the cessation of the action of pyrogens on the thermoregulation center, the set point drops to the normal level. And then the hypothalamus begins to perceive the temperature as increased. He urgently takes action: he sends a signal for the dilation of skin vessels and profuse sweating. Active heat transfer begins. It continues until the temperature returns to normal.

Why does all this happen and why do we need an increase in temperature? Fever always appears when pathogens of acute infectious diseases enter the body. It is believed that an increase in body temperature is part of the measures that the body takes to destroy the source of infection. But we must honestly admit that the role of increasing body temperature in the fight against infection has not yet been fully established. It is believed that self-heating of the body

firstly, it activates all processes in it, including protective reactions (the rate of production of antibodies and interferons - internal antiviral agents - increases, the neutralization of toxins in the liver is activated, the excretion of urine, and with it - toxins, is accelerated),

and secondly, it prevents the proliferation of harmful microorganisms and causes their death.

When is it necessary to lower the temperature during acute infectious diseases? Doctors advise taking antipyretics if it starts to “go off scale” beyond 38-38.5 degrees, since at such values ​​the load on the heart and lungs greatly increases, and at higher values ​​there is a direct threat to life. In the first months of life, temperatures above 38 degrees are dangerous, as the risk of seizures and damage to the nervous system increases.

If your health worsens significantly at a lower temperature (37-37.5°C), you should also not delay taking antifever medications. But it also happens (especially in young children) that the thermometer “goes” beyond 38 degrees, and the child feels quite normal: plays, runs. In this case, there is no need to create additional stress on the liver.

In a word, the signal to take an antipyretic drug should be not so much the thermometer readings as the state of the body. In general, adults do not need to lower their temperature if the numbers on the thermometer are below 38.5 degrees, and for children - below 38.

Do you know?

Why is the extreme temperature mark on thermometers 42°C? Because it is at this temperature that denaturation (clotting) of blood proteins begins. A similar process occurs when boiling an egg: the transparent, gelatinous egg white becomes white and dense. In addition, at this temperature, metabolic disorders begin in the brain. This condition is no longer compatible with life, that is, fatal.

Source: http://allforchildren.ru/why/why91.php

Why does body temperature rise?

The torment eases if you know why your body temperature rises. Information helps to understand why the temperature rises in the evening

The human body can maintain its temperature without paying attention to the external environment. The ability to regulate 95% of heat transfer through the skin makes us unique.

Changes in heat exchange tell us why body temperature rises. For us, the acceptable thermal state is 35.5 - 37.0°. Any of us knows what an increase in body temperature is. There can be a huge number of reasons, ranging from segmental pneumonia to the common cold or even an abscess. This article will discuss the most common one, namely the one caused by infectious diseases.

Why does body temperature rise when sick?

Primary pyrogens are specific factors that are secreted by infectious agents. They can also be formed by means of damage to the body’s own tissues by the infectious process. Leukocyte pyrogen refers to a type of primary pyrogen, which is formed primarily due to interaction with connective tissue, as well as some blood cells.

Thanks to pyrogens, we can feel a fever because they cause an increase in body temperature. The secondary pyrogen, which is called interleukin-1, can increase the effectiveness of the protective function of the blood by increasing the number of white cells in it. This pyrogen also causes drowsiness, muscle pain, and decreased appetite in the human body. Usually, all these symptoms are typical when a temperature of 37 appears with a cold or most infectious diseases.

The brain, or more precisely a part of it called the hypothalamus, is responsible for regulating body temperature. When secondary pyrogens affect this part of the brain, it perceives information about normal temperature, which is transmitted to it by peripheral receptors, as reduced and tries to save the body from hypothermia. Very often, when body temperature rises, herpes develops on the mucous membrane of the lips.

When the temperature is 37 and weakness, and then an immediate increase in body temperature, this is a protective-adaptive reaction of the body. It contributes to the fight against infectious diseases, as well as the destruction of its consequences. Increasing body temperature prevents the proliferation of harmful microorganisms and also helps reduce their resistance to certain medications, which will allow treatment to be more effective. Not long ago, biologists discovered that during fever, the antitoxic function in the liver increases, which significantly reduces the harm that drugs cause to the body. In addition, the production of antibodies and interferon increases, which serves as an antiviral defense for the human body.

When detecting an increase in temperature, many people ask how to lower the temperature and is it worth lowering it at all? There are not frequent cases when people begin to grab antipyretic drugs when the temperature has not reached 37.5. Naturally, it is not advisable to do this, since it can interfere with the body’s ability to fight the infection. It is advisable to start forced temperature reduction at 39 degrees. Otherwise, it can negatively affect the central nervous system, as well as the cardiovascular system.

What could cause a temperature of 37

You are completely apathetic, your body seems heavy, your temperature has been at 37° for a whole week. Medicine calls this condition a pre-inflammatory process.

Causes of temperature 37 degrees:

  1. Past serious illness
  2. Thermoneurosis – failure of thermoregulation during exercise or stress
  3. An intestinal infection has appeared
  4. Experiences
  5. Typical fever
  6. Hyperthermia
  7. Viral infections
  8. Malignant formations
  9. Autoimmune changes
  10. Hyperthyroidism – excess thyroid hormones
  11. Hormonal imbalance

A temperature of 37 does not require antipyretics. Eat more fruits and vegetables. Try to get a good night's sleep.

In the evening the temperature is 37, this is normal and there is no need to worry. Check your temperature in the evenings throughout the week. In the absence of additional symptoms, this indicates increased metabolism after: a heavy dinner, physical or mental stress. Your temperature will return to normal once you have had a good rest.

For women, a temperature increase of 37 indicates a physiological state and hormones. This temperature can occur in pregnant women, after childbirth, during breastfeeding, and before menstruation.

Why does the temperature rise in the evening

A temperature change of one degree is not a reason to worry. It’s a completely different matter when the temperature systematically rises only in the evening. The reasons may be:

  • Biorhythms
  • Chronic form of inflammation
  • Fatigue
  • Toxins contained in household chemicals

After consulting with your doctor, you will understand the exact cause of your evening temperature.

Why is body temperature 36? Causes

We have warm blood. Our temperature is a continuation of metabolism. It is important for body functions to maintain internal temperature so that organs work without deviation.

The brain houses the control center for body temperature. It is known as the hypothalamus, which warns of extreme cold or hot conditions. The hypothalamus causes blood flow to the outer layers of the skin to decrease or open. This is how normal body temperature is regulated.

Every process that occurs inside our body requires energy. The body lacks energy, and as a result, the functioning of body components changes. So, if the brain receives little energy, thought processes such as memory and focus deteriorate.

The body needs energy, so the body finds ways to keep itself warm.

In deep sleep, the temperature is 36. The human body's systems function perfectly because oxygen is supplied in sufficient quantities.

Different national groups of people consider their temperature to be normal. So the body temperature of the Japanese is 36 degrees, of Australians and Americans - 37°.

Gender and age have their differences. The temperature is finally set in boys at 18 years old, and in girls at the age of 18. Men are 0.5-0.7 colder than women.

Why is body temperature below 36

A person's lowest temperature is in the morning from 4 to 6 o'clock. The blood cools down in the morning and becomes viscous and syrupy. The more viscous it is, the more difficult it is for blood to flow through the body and warm it. Sometimes the following symptoms of low temperature are observed:

The list of symptoms of low temperature are signals of possible diseases:

  • Diabetes
  • Drug addiction and alcoholism
  • Hypothyroidism (not enough thyroid hormones in the thyroid gland)
  • Infectious diseases
  • Kidney failure
  • Cirrhosis of the liver
  • Sepsis
  • Allergy
  • Shock
  • Rapid breathing/asthma
  • Cancer
  • Stress
  • Insomnia

Raw foodists always have an acceptable body temperature below 36 degrees. They are confident that lowering body temperature by at least one degree will make it possible to live twice as long. What if they are right?

Why does body temperature rise? Video

Why does body temperature rise before menstruation?

Female hormones influence the phases of the menstrual cycle. Because of this, the temperature constantly fluctuates. The body temperature before menstruation after ovulation, between the 17th and 25th day of the cycle, increases in many women. Before ovulation, early morning temperatures range from 36.11 to 36.38 degrees Celsius, and after ovulation they rise to 36.° Celsius.

After ovulation, the temperature remains elevated for a couple of weeks until the next period. During pregnancy, it remains elevated for 18 days. It is believed that most women ovulate at a low temperature point, but this is only true for a minority of women. Most often, ovulation occurs the day before the temperature rises. Basal body temperature rises immediately after ovulation and remains 4 degrees higher.

It can be helpful to use a dedicated basal or digital thermometer to more accurately track small changes.

On the thermometer, a temperature during menstruation of 38 warns of problems in the body:

  • Inflammation of the appendages, inflammation of the uterus
  • Inflammatory process in the intestines
  • Premenstrual syndrome (PMS)
  • Inflammation of the urinary
  • Early menopause

When menopause occurs, women endure temperatures of 37°C or even higher. In addition to the temperature, they sometimes feel either hot or sweaty.

Why does body temperature increase during pregnancy?

The question “can temperature be a sign of pregnancy” has a clear answer: “yes, it can!”

Your body temperature rises after conception because your body releases one of the main pregnancy hormones, progesterone. At the beginning of pregnancy, it is produced by the female body, and then by the placenta of the unborn child. The level of progesterone and metabolism increases, and this is additional heat.

Progesterone affects the thermoregulation process of a pregnant woman. This feature explains why body temperature during early pregnancy rises to 37.5 degrees. If the temperature drops noticeably, there is a risk of miscarriage; if the temperature rises, the mother’s body suffers from inflammation.

Temperature without symptoms in an adult

In adults, danger arises when the temperature rises without symptoms. It causes additional stress on the heart and lungs. In this case, energy consumption increases, as the need of body tissues for oxygen and nutrition increases. A consultation with a doctor is necessary to determine if there are or were signs of:

  1. Hematomas or bruises
  2. Infections
  3. Benign or malignant tumors
  4. Endocrine system disorders
  5. Lymphoma or leukemia
  6. Joint diseases
  7. Pyelonephritis
  8. Complications after flu or sore throat
  9. Allergy
  10. Nervousness

Temperature without symptoms in a child

A child's temperature regulator is finally formed after the first year of life. Therefore, young mothers should not panic if the child’s temperature on the thermometer is 37.2 without symptoms.

Most often, the reason for such a temperature can be overheating in the summer from the sun, and in the winter from mom’s zeal to dress the baby warmly. There are other causes of fever without symptoms:

  • Teeth cutting
  • Got vaccinated
  • Allergic reaction
  • Stressful situation
  • A reaction to a virus or infection has begun
A child’s temperature may rise with a sharp decrease in hemoglobin.

Dysbiotic conditions of the vagina often lead to thrush (candidiasis), which.

Lymph nodes in young children are usually small in size and have a soft structure.

The Ministry of Health is, as you know, the body of the Russian Federation.

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Source: http://nawideti.info/zdorove-rebenka/pochemu-povyshaetsya-temperatura-tela.html

Increased body temperature

About ways to measure body temperature

It would seem that there is nothing complicated in measuring body temperature. If you don’t have a thermometer at hand, you can touch the sick person’s forehead with your lips, but errors often occur here; this method will not allow you to accurately determine the temperature.

Another more accurate technique is pulse counting. An increase in temperature of 1 degree leads to an increase in heart rate of 10 beats per minute. Thus, you can roughly calculate how much your temperature has increased, knowing your normal heart rate. Fever is also indicated by an increase in the frequency of respiratory movements. Normally, children take approximately 25 breaths per minute, and adults take up to 15 breaths.

Measuring body temperature with a thermometer is carried out not only in the armpit, but also orally or rectally (holding the thermometer in the mouth or anus). For young children, a thermometer is sometimes placed in the groin fold. There are a number of rules that should be followed when measuring temperature to avoid getting a false result.

  • The skin at the measurement site should be dry.
  • During the measurement, you cannot make any movements, it is advisable not to talk.
  • When measuring the temperature in the armpit, the thermometer should be held for about 3 minutes (the norm is 36.2 - 37.0 degrees).
  • If you use the oral method, then the thermometer should be held for 1.5 minutes (the normal value is 36.6 - 37.2 degrees).
  • When measuring the temperature in the anus, it is enough to hold the thermometer for one minute (the norm with this method is 36.8 - 37.6 degrees)

Normal and pathological: when is it time to “bring down” the temperature?

It is generally accepted that the normal body temperature is 36.6 degrees, however, as you can see, this is quite relative. The temperature can reach 37.0 degrees and is considered normal; it usually rises to such levels in the evening or in the hot season, after physical activity. Therefore, if before going to bed you saw the number 37.0 on the thermometer, then there is nothing to worry about yet. When the temperature exceeds this limit, we can already talk about fever. It is also characterized by a feeling of heat or chills, redness of the skin.

When should you lower your temperature? Doctors at our clinic recommend using antipyretics when the body temperature in children reaches 38.5 degrees, and in adults - 39.0 degrees. But even in these cases, you should not take a large dose of an antipyretic; it is enough to reduce the temperature by 1.0 - 1.5 degrees so that the effective fight against infection continues without a threat to the body.

A dangerous sign of fever is the paleness of the skin, its “marbling”, while the skin remains cold to the touch. This indicates spasm of peripheral vessels. This phenomenon is usually more common in children and is followed by seizures. In such cases, it is necessary to urgently call an ambulance.

Infectious fever

With bacterial or viral infections, the temperature almost always rises. How much it increases depends, firstly, on the amount of the pathogen, and secondly, on the state of the person’s body. For example, in older people, even an acute infection may be accompanied by a slight increase in temperature.

It is curious that with various infectious diseases, body temperature can behave differently: rise in the morning and fall in the evening, increase by a certain number of degrees and decrease after a few days. Depending on this, different types of fevers were identified - perverted, relapsing and others. For doctors, this is a very valuable diagnostic criterion, since the type of fever makes it possible to narrow down the range of suspected diseases. Therefore, during infection, the temperature should be measured in the morning and evening, preferably during the day.

What infections increase the temperature?

Usually, during an acute infection, a sharp temperature jump occurs, and general signs of intoxication occur: weakness, dizziness or headaches, nausea.

1. If the fever is accompanied by a cough, sore throat or chest, difficulty breathing, hoarseness, then we are talking about a respiratory infectious disease.

2. If the body temperature rises, and along with it diarrhea begins, nausea or vomiting, and abdominal pain occur, then there is virtually no doubt that this is an intestinal infection.

3. A third option is also possible, when, against the background of fever, a sore throat, redness of the pharyngeal mucosa occurs, sometimes a cough and runny nose are noted, as well as abdominal pain and diarrhea. In this case, rotavirus infection or the so-called “intestinal flu” should be suspected. But for any symptoms, it is better to seek help from our doctors.

4. Sometimes a local infection in any part of the body can cause fever. For example, fever is often accompanied by carbuncles, abscesses or cellulitis. It also occurs in diseases of the genitourinary system (pyelonephritis, kidney carbuncle). Only in the case of acute cystitis, fever almost never occurs, because the absorption capacity of the bladder mucosa is minimal, and substances that cause an increase in temperature practically do not penetrate into the blood.

Sluggish chronic infectious processes in the body can also cause fever, especially during the period of exacerbation. However, a slight increase in temperature is often observed during normal times, when there are practically no other obvious symptoms of the disease.

When does the temperature still rise?

1. An unexplained increase in body temperature is observed in cases of cancer. This usually becomes one of the first symptoms, along with weakness, apathy, loss of appetite, sudden weight loss and depressive mood. In such cases, the elevated temperature lasts a long time, but remains febrile, that is, it does not exceed 38.5 degrees. As a rule, with tumors the fever is wavy. Body temperature slowly increases, and upon reaching its peak, it also slowly decreases. Then there comes a period when the temperature remains normal, and then it begins to rise again.

2. With lymphogranulomatosis or Hodgkin's disease, undulating fever also often occurs, although other types can also be observed. An increase in temperature in this case is accompanied by chills, and when it decreases, heavy sweat occurs. Increased sweating is usually observed at night. Along with this, Hodgkin's disease manifests itself as enlarged lymph nodes, and sometimes there is skin itching.

3. Body temperature rises in case of acute leukemia. It is often confused with a sore throat, since there is pain when swallowing, a feeling of palpitations, enlarged lymph nodes, and often increased bleeding (hematomas appear on the skin). But even before the appearance of these symptoms, patients note a sharp and unmotivated weakness. It is noteworthy that antibacterial therapy does not give positive results, that is, the temperature does not decrease.

4. Fever may also indicate endocrine diseases. For example, it almost always appears with thyrotoxicosis. In this case, the body temperature usually remains subfebrile, that is, it does not rise above 37.5 degrees, although during periods of exacerbations (crises) a significant excess of this limit can be observed. In addition to fever, thyrotoxicosis is associated with mood swings, tearfulness, increased excitability, insomnia, sudden loss of body weight due to increased appetite, trembling of the tip of the tongue and fingers, and menstrual irregularities in women. With hyperfunction of the parathyroid glands, the temperature can increase to 38 - 39 degrees. In the case of hyperparathyroidism, patients complain of severe thirst, frequent urge to urinate, nausea, drowsiness, and itchy skin.

5. Particular attention should be paid to fever that appears several weeks after respiratory illness (most often after a sore throat), since it may indicate the development of rheumatic myocarditis. Usually the body temperature rises slightly - up to 37.0 - 37.5 degrees, however, such a fever is a very serious reason to contact our doctor. In addition, body temperature may increase with endocarditis or myocardial infarction, but in this case, the main attention is not paid to pain in the chest, which cannot be relieved with available analgesics.

6. It is curious that the temperature often rises with a peptic ulcer of the stomach or duodenum, although it also does not exceed 37.5 degrees. Fever gets worse if there is internal bleeding. Its symptoms are sharp, stabbing pains, vomiting “coffee grounds” or tarry stool, as well as sudden and increasing weakness.

7. Cerebral disorders (stroke, traumatic brain injury or brain tumors) provoke an increase in temperature, irritating the center of its regulation in the brain. Fever can be very different.

8. Drug fever most often occurs in response to the use of antibiotics and some other drugs, and it is part of an allergic reaction, therefore it is usually accompanied by itchy skin and rashes.

What to do at elevated temperatures?

Many, having discovered that they have an elevated temperature, immediately try to reduce it, using antipyretic drugs available to everyone. However, their thoughtless use can cause even more harm than the fever itself, because elevated temperature is not a disease, but just a symptom, so suppressing it without identifying the cause is not always correct.

This is especially true for infectious diseases, when infectious agents must die under conditions of elevated temperature. If you try to lower the temperature, the infectious agents will remain alive and unharmed in the body.

Therefore, do not rush to run for pills, but lower your temperature wisely when the need arises, our specialists will help you with this. If fever has been bothering you for a long time, you should contact one of our doctors: as you can see, it can indicate many non-infectious diseases, so additional research is necessary.

Source: http://chh.ru/helpful-information/miscellaneous-articles/povyshennaya-temperatura-tela/

Why does body temperature rise

Everyone’s body temperature increased, but for the common person it is not clear why our body needs this. Yes, exactly, our body needs this to fight infection. There are a lot of interesting things in our brain, and there is also a thermoregulation center, which is responsible for maintaining a constant body temperature by our body. It just so happens that we are warm-blooded mammals and it takes us almost 50% of the calories we consume from food every day to maintain a constant body temperature.

Now a little about why the body sometimes needs to increase its body temperature.

An increase in body temperature is a complex physiological process that is triggered in response to the penetration of infectious agents into the body. But not just penetration, since thousands of them penetrate every minute and are successfully destroyed by the immune system. The penetration of microbes or viruses must be accompanied by their consolidation, active reproduction and the release of exogenous (come from outside) pyrogens, then the body’s defenses give a signal about an increase in body temperature.

The importance of this process is that elevated temperature creates unfavorable conditions for the proliferation of bacteria and viruses, as well as a powerful stimulus for the release of interferon, increased activity of lymphocytes and phagocytosis, and other protective agents. At elevated temperatures, tumor growth slows down.

But why do many people consider temperature the main enemy during the period of illness and fight so hard against it?

Firstly, the point is a lack of understanding of the mechanism of the disease itself, as well as imaginary relief when the temperature is brought down.

Secondly, the fear of raising body temperature to very high numbers, which in fact already harms our body. But rising only above 39 C° Celsius is dangerous.

Thirdly, for some reason, many have developed the opinion that if there is a temperature, then a person is sick, and if it is brought down, then that means he is no longer sick. I'm not kidding, many people actually think so.

And finally, now what to do if your body temperature rises?

If you have a cold, flu, sore throat, chronic tonsillitis has worsened, or any other infection, do not rush to lower your body temperature if it does not exceed 38.5 C° Celsius. Do not deprive the body of an important protective reaction. It’s even better to help the body in this matter: cover yourself with a warm blanket to reduce heat transfer. Yes, of course, in case of severe infections (malaria, pneumonia, etc.), when the temperature goes off scale, it is necessary to bring it down in order to avoid the main complication - cerebral edema, from which people so often die with the flu.

Watch a video about elevated body temperature:

The temperature can rise not only with infectious diseases, but also with other diseases not associated with bacteria and viruses.

  • With thyrotoxicosis, there is often an increase in temperature and an increase in basal metabolism.
  • Fever can often accompany a tumor of the adrenal cortex - pheochromocytoma.
  • Another cause of fever not associated with infection is traumatic brain injury.

In addition to all this, keep in mind that there are several methods for measuring temperature, and there are now many types of thermometers for these purposes. The above figures correspond to the oldest measurement method - this is in the armpit.

see also

One Response to Why body temperature rises

Pomnitsa, my temperature rose to 40 degrees when I was sick with the flu, an ambulance arrived and they gave me an injection. The temperature dropped to 38. Now I realized that if it weren’t for the ambulance, I could have given up my skates.

Source: http://bessudnov.com/infekcii/povyshannaya-temperatura-tela