The normal temperature of the human body is generally maintained at about 36.8-37.2°C. In summer, it is not because of the hot weather that the human body temperature keeps rising, because the body has good heat dissipation function and can excrete sweat through sweat glands to play the role of heat dissipation and maintain the stability of the body temperature. Some patients will have fluctuations in body temperature after strenuous activity, but the elevated body temperature can gradually return to normal after the exercise stops, which is a normal physiological phenomenon. If a patient has a bacterial or viral infection in summer, it will be accompanied by chills and high fever, and the body temperature can be more than 39.5℃, in which case the patient needs active anti-infection and antiviral treatment. This can be done by drinking a lot of water to promote the excretion of toxins in the body and maintain the body temperature within the normal level as much as possible, which can effectively reduce the clinical symptoms such as weakness, chills and poor appetite.