When recurrent fever occurs after heatstroke, in addition to considering the symptoms of fever caused by heatstroke, it is also necessary to rule out whether the recurrent fever is caused by the weakness of the body during heatstroke or the infection of the upper respiratory tract caused by excessive sweating at that time. In addition to the formal treatment of heat stroke, such as drinking more water, saline or using intravenous rehydration to deal with it, applying acetaminophen or ibuprofen to reduce fever, it is recommended to go to the hospital for blood tests. If there is an elevated white blood cell, it may be a bacterial infection, at this time it is necessary to apply antibiotics to treat, commonly used amoxicillin, clindamycin, roxithromycin or cephalosporin antibiotics, etc., for the treatment of bacterial infections of the upper respiratory tract is more effective.