Whether the temperature is measured through the armpit, mouth or rectum, 36.5 ℃ is considered normal body temperature, not fever. The human body has a thermoregulatory center regulation, the body heat production, heat dissipation usually maintains a dynamic balance, when the body is affected by pyrogen or dysfunction of the thermoregulatory center, heat production will increase, and heat dissipation can not be increased accordingly, the body temperature will rise. The normal body temperature range of the human body is relatively constant, such as oral sublingual temperature 36.3℃-37.2℃, rectal temperature 36.5℃-37.7℃, and axillary temperature 36.0℃-37.0℃. Therefore, regardless of which measurement method is taken, a body temperature of 36.5°C is considered normal and there is no need to worry excessively. When the patient is conscious of an elevated body temperature, the temperature should be measured as soon as possible to see if it is normal. If it is a fever, bed rest should be taken as soon as possible, drink plenty of water, and take physical cooling treatment in time. If the fever is severe and persists, the patient should go to the fever clinic for symptomatic treatment.