The normal body temperature of adults is between 36 and 37 degrees. The human body temperature is controlled by the cerebral cortex and the hypothalamus thermoregulatory center, and generally has a certain fluctuation range, with a low body temperature in the morning and a high body temperature in the afternoon, but the fluctuation range will not exceed one degree. In addition, the body temperature may also be high after strenuous exercise or after a full meal. In addition, the body temperature of older people is slightly lower than that of young people, and the body temperature of women is higher during pregnancy. If the body temperature is greater than 37.3 degrees, it is considered feverish. The common causes of fever are bacterial or viral infections, such as lobar pneumonia with high fever, appendicitis with fever, and tonsillitis with a sore throat and fever. If the temperature exceeds 41 degrees, the fever is super high. In case of fever, one should consider physical cooling and the other should consider medication.