The normal value of the body’s core temperature is generally around 37°C. The temperature of the body surface can be affected by a variety of different body parts, as well as the surrounding environment. Usually the temperature of the body surface is measured, the temperature of the armpit is usually chosen because clamping the armpit can form a relatively stable temperature environment when measuring the temperature of the armpit. The normal temperature of the armpit is between 36-37°C. There is usually no way to accurately measure the temperature of other parts of the body surface with a mercury thermometer. Currently there are infrared ear temperature gun or forehead temperature gun, can be close to the skin surface to measure the local temperature, the normal is also in the normal range of 36.0-37 ℃.