Excluding the interference of other factors, the axillary temperature, for example, 8-year-old child body temperature 37.3 ℃ belongs to the phenomenon of hypothermia. Take the axillary temperature as an example, the human body’s normal body temperature range between 36 ℃ and 37 ℃, generally speaking more than 37.2 ℃ should be considered as a low fever phenomenon. However, the 8-year-old child’s own metabolism is faster, and easily affected by the environment, exercise, emotions and other factors, such as strenuous exercise, the body temperature may rise slightly, up to 37.3 ℃, but usually eliminates the interference, the body temperature will return to the normal range. If the body temperature is still 37.3 ℃ in a quiet state, it belongs to the fever, monitor the temperature at the same time, can be taken under the guidance of the doctor physical hypothermia and so on. 8-year-old child 37.3 ℃, if the body temperature continues to rise or low fever does not go down, it is recommended to seek medical attention.