Axillary temperature between 37.3°C and 38°C is considered as hypothermia. It is recommended to monitor the body temperature to see what the maximum temperature is. For recurrent hypothermia, consider the following causes, the most common of which is infectious hypothermia, including bacterial and viral infections. Examples include tuberculosis infection, chronic biliary tract infection, chronic pyelonephritis, urinary tract infection, otitis media, and sinusitis. Among the infectious causes of hypothermia, infection by tuberculosis bacilli is the most common and manifests as afternoon hypothermia accompanied by cough, sputum, malaise, lethargy, and night sweats. Non-infectious hypothermia can be caused by hyperthyroidism, rheumatic fever, hematological diseases, tumors, rheumatic immune related diseases such as systemic lupus erythematosus, as well as fever caused by emotional instability, excessive stress, etc. Central thermoregulatory disorders, it is recommended to monitor temperature changes in combination with the presence of other symptoms. If the fever recurs, go to the fever clinic promptly to find out the cause.