The human body temperature is considered to be feverish when it exceeds 37℃, but it is divided into different degrees according to the value of the body temperature. The body temperature between 37-38.5℃ belongs to low fever, between 38.5-39.5℃ belongs to high fever, and the body temperature over 39.5℃ belongs to super high fever. The body temperature of different age groups of the human body is relatively different, for example, infants and children have a higher basal body temperature, between 36.2-37.2 ℃ is normal, the elderly due to the slow basal metabolism, the basal body temperature is low, the patient can feel uncomfortable when the body temperature is above 36.8 ℃, the use of ordinary thermometer is more accurate, the use of thermometer scale should be dumped to 35 ℃ or less, in a quiet Measurements should be made in a quiet state. It is recommended to use ordinary thermometer to measure, electronic thermometer has a certain error, although easy to use, but affect the results.