Fever is based on the degree of fever, which can be classified as low, medium, high, and ultra-high. Generally the axillary temperature is above 37℃, oral temperature is above 37.3℃ and anal temperature is above 37.6℃, which is considered feverish. Fluctuations of 1℃ or more during the day and night are diagnosed as fever. It is generally considered that 37.5℃-38℃ is low fever, 38.1-39℃ is moderate fever, 39.1℃-40.4℃ is high fever, and above 40.5℃ is super high fever, which is divided into these four degrees. Generally belong to the moderate fever or below, temporarily do not need to take antipyretic drugs, you can use physical cooling. You can wipe the patient’s neck, armpits and groin with an alcohol cotton ball or a towel soaked with warm water to achieve physical cooling. In addition, you can also let him drink more warm water and warm juice to take away the heat through urination and achieve the purpose of cooling. Generally over 39℃ or 38.5℃, it is recommended to use antipyretic agents, more commonly used acetaminophen, ibuprofen, etc.