Hypothermia involves a wide range of diseases and usually refers to a body temperature that is above normal but not higher than 38°C. For the treatment of hypothermia, it is important to first identify the cause of the hypothermia and then take measures to treat the cause. The most common cause of hypothermia is an infection, such as Mycobacterium tuberculosis infection, which we know is often manifested as a low fever in the afternoon. The most common type of tuberculosis infection is pulmonary tuberculosis. If non-tuberculosis is suspected, a chest X-ray or CT examination of the lungs should be performed to look for lesions, followed by a sputum culture to check for Mycobacterium tuberculosis, and then anti-tuberculosis treatment should be administered. Some tumor patients and patients with immunodeficiency diseases such as AIDS may also develop prolonged hypothermia. Unexplained hypothermia should not be abused because fever is a form of defense of the body against foreign invaders, and if abused antipyretics may mask certain diseases and delay treatment. All in all, if a low fever occurs, it should be closely observed, do not rush to take medicine, you can take some physical cooling methods, if the low fever persists, should promptly go to the hospital to identify the cause. In addition, usually actively participate in physical exercise to enhance physical fitness, improve the ability to resist pathogenic infections and reduce the occurrence of hypothermia.