The body temperature of infants is generally higher than that of adults, but the axillary temperature, for example, usually does not exceed 37.3℃. Under normal circumstances, the baby’s body temperature may be higher than adults, mainly due to the baby’s metabolism is relatively fast, coupled with its own ability to dissipate heat is relatively poor, so the body temperature will appear high. And infants’ thermoregulatory center is still not well developed, and is easily affected by the external environment, such as too thick clothing, indoor high, eating or emotional excitement, may make the baby’s body temperature rise. However, after eliminating the influencing factors, the normal armpit temperature of infants will not exceed 37.3℃, if it exceeds 37.3℃, it means that there is fever, and it is recommended to seek medical treatment in time.