Fever can only be reduced by treating the symptoms and causes. Fever may be caused by bacterial infection, viral infection or heat stroke, etc. It can be treated by physical cooling or oral antipyretic medication in combination with the cause of the illness. If the body temperature does not exceed 38.5℃, physical cooling can be used first, such as wiping the body with lukewarm water, which can promote blood circulation and help the body temperature to subside. If the body temperature exceeds 38.5 ℃, you need to take ibuprofen or acetaminophen, but also with the cause of the combination of drugs, for example, if it is a bacterial infection, but also with amoxicillin combined treatment. For example, if it is a viral infection, oral antiviral medications such as ribavirin should be given at the same time. If the fever is caused by heatstroke, the patient needs to be moved to a ventilated environment and relieved with patchouli. Fever can be caused by a variety of factors, not all of which are mentioned above, and if the symptoms do not subside, hospitalization is required.