Normal body temperature: The normal body temperature is in a range, with oral sublingual temperature of 37.0 (in the range of 36.3-37.2), rectal temperature of 36.5-37.7 (0.3-0.5 higher than oral temperature) and axillary temperature of 36.0-37.0 (0.3-0.5 lower than oral temperature). The body temperature of healthy people is relatively stable. When the body temperature exceeds the maximum limit of normal body temperature, it is called fever, which is what ordinary people call fever. The traditional idea is that the normal body temperature is 37℃, but due to the influence of the test place, time, season and individual differences, it is now considered that the normal body temperature can not be simply expressed by the figure of 37℃.