An axillary body temperature of 37.3°C is not normal. The normal axillary body temperature is 36.0℃-37.0℃, and if it reaches 37.3℃-38℃, it is a low degree of fever. When the body is under the action of thermogenic or thermogenic center disorder, the heat production will increase, but the heat dissipation cannot increase accordingly, and the body temperature will rise, when the body temperature exceeds the normal range is called fever. If the axillary temperature is 37.3℃, accompanied by cold and flu or diarrhea, it may be a hypothermia caused by infectious factors. If the temperature persists or tends to rise, a detailed examination should be conducted at a hospital fever clinic to clarify the diagnosis and then actively treat the patient. When hypothermia occurs, patients need to take rest, get enough sleep, drink more water, ensure a light, easy-to-digest diet, and pay attention to measuring body temperature and observing temperature changes so that timely measures can be taken.