Low fever

Introduction Normal body temperature, oral temperature is generally 35.8 ~ 37.4 ° C. In normal conditions, the normal person's body temperature should not be higher than 37.5 °C. If it is often higher than 37.3 ° C, it is low heat. Low heat body temperature is higher than normal, but below 38 °C, it is called low heat. The low fever referred to by Chinese medicine includes a patient's subjective and conscious heart and heart heat, annoying heat in the chest and a condition in which the body temperature is not higher than normal. Common manifestations are night heat, early cold, or nighttime fever, afternoon hot flashes, cold hands and feet, bone evaporation heat, often accompanied by weight loss, fatigue, fatigue, anorexia, irritability, red tongue, less moss, pulse count And other symptoms and signs.

Cause

There are many reasons for causing patients to have low fever for a long time. They can be divided into three categories: first, infectious low fever, which is the most common in life, accounting for about 40%, and in all infectious low fever, tuberculosis is the most common. . Tuberculosis infection is characterized by low fever in the afternoon, and may be accompanied by coughing, fatigue, sweating at night or after waking up. Long-term hypothermia caused by chronic biliary infection, chronic pyelonephritis, chronic urinary tract infection, chronic pelvic inflammatory disease, chronic otitis media, chronic sinusitis, AIDS, subacute endocarditis and viruses are also common.

Followed by non-infectious fever, including hyperthyroidism, rheumatic fever, lupus erythematosus, blood diseases, tumors, drug fever and so on. Once again, it is functional fever, more common in young women and children under the age of 3, with fever in the morning, may also be accompanied by sweating, hand tremors, insomnia, fatigue and not wanting to eat.

an examination

Related inspection

Body temperature measurement mammography X-ray examination blood routine

If someone has a daily mouth temperature of 37.5 ° C to 38.3 ° C and a temperature of 37.4 ° C to 38.3 ° C, and it does not retreat for more than 3 weeks, it can be called "long-term low fever". Long-term low fever often indicates that the body may have some problems, need to pay attention, and need to do related checks in time, such as: blood routine, urine routine, tuberculin test, sputum bacterial culture, chest X-ray film, etc. .

Differential diagnosis

diagnosis:

Low fever is a common symptom, and checking for low heat is a very delicate job. Especially for functional hypothermia, it must be observed after a long period of time, and it can be diagnosed on the basis of excluding organic diseases.

The child's long-term low fever means that the child's body temperature is between 37.4 ° C and 38 ° C and lasts for more than 2 weeks. There are many diseases that cause low fever in children for a long time. In summary, there are two major types of diseases caused by organic diseases or dysfunction. Chronic infections are most common in low fever caused by organic diseases, such as pediatric tuberculosis, chronic pyelonephritis, chronic sinusitis, and certain parasitic diseases. Due to the low fever caused by infection factors, appropriate measures should be taken for the infected pathogens during treatment. At the same time, some non-infectious factors can also lead to long-term low fever, such as anemia in children, malignant tumors, hyperthyroidism, systemic lupus erythematosus and so on. For these non-infectious causes of hypothermia, detailed examination should be carried out to confirm the diagnosis and actively treat the primary disease causing hypothermia.

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