Axillary body temperature of 37.5 degrees Celsius is also a manifestation of fever, which belongs to the low fever category of fever, because axillary body temperature between 37 degrees Celsius and 38 degrees Celsius is a manifestation of low fever. The causes of hypothermia are also very many, the short-term appearance of hypothermia, to consider the infection factors, such as the initial stage of the viral cold, as well as weak patients, will also appear repeatedly, the performance of hypothermia; long-term hypothermia patients should pay attention to tuberculosis is also caused by the phenomenon of frequently elevated body temperature, and still relatively stubborn; rheumatic diseases are also possible to cause hypothermia, most Most of them are accompanied by joint pain and other related symptoms. If a patient has an axillary temperature of 37.5 degrees Celsius, a timely examination should be conducted to determine the cause of the patient’s axillary temperature of 37.5 degrees Celsius, especially in patients with frequent hypothermia, further examination should be conducted to determine the cause, such as throat examination, chest X-ray, blood sedimentation, routine blood tests, tuberculin test and chest X-ray if tuberculosis is suspected, and anti-tuberculosis or rheumatoid factor tests if rheumatic diseases are suspected. If rheumatic diseases are suspected, anti-tuberculosis tests and chest radiographs should be performed.