Long-term afternoon temperature 37.3 is not normal, the body’s normal axillary temperature is between 36-37 ℃, if the body temperature in 37.3 ℃ is considered to be hypothermia, in the clinical cause of hypothermia is very many reasons, pathologic factors such as infection, tuberculosis, and physiological factors such as summer hypothermia can appear hypothermia. 1. Physiological reasons: due to autonomic dysfunction, including premenstrual or early pregnancy, summer or high temperature around, after strenuous exercise have different degrees of low fever, if the patient does not have any symptoms, do not need special treatment, you can drink more warm water, reduce the ambient temperature, the body temperature will fall. 2. Pathological causes: If the patient’s clinical symptoms such as sweating, fatigue, lethargy and other symptoms to consider the possibility of tuberculosis and other infections, in addition, rheumatism, Borrelia burgdorferi infections and other diseases may appear in the afternoon low fever. Considering the pathologic elevation of body temperature, physical cooling can be carried out, such as the use of antipyretic patches or using a warm towel to wipe the armpits, groin and other large arterial pulsations to help dissipate the heat, but do not wipe the palm of the hand, the heart of the foot. At the same time need to treat the original disease, tuberculosis patients need anti-tuberculosis treatment, rheumatic patients need anti-rheumatic treatment. Pay attention to observation, if the body temperature continues to 37.3 degrees Celsius or continues to rise, you need to go to the hospital to do a checkup, to clarify the cause of fever, targeted treatment.