A child with a temperature of 39℃ is considered to have a moderate fever, which needs to be promptly reduced and the cause of the fever (e.g. respiratory tract infection) clarified and treated. Fever is a common symptom in children, usually considered body temperature over 37.3 ℃ for fever, of which low fever that is ≤ 38 ℃, moderate fever for 38.1 ℃ -39.0 ℃, high fever for 39.1 ℃ -41 ℃, ultra-high fever for > 41 ℃, fever can cause children obvious discomfort, such as generalized weakness, muscle aches and pains and respiration and heart rate increase, etc., for the younger, the neurological development is not perfect The baby may have convulsions. It is necessary to actively and reasonably symptomatic fever, such as according to the child’s weight to give the appropriate dose of antipyretic drugs (such as ibuprofen or acetaminophen), and discretionary warm water wiping and other physical cooling. At the same time, the cause of fever should be identified and treated. For example, acute upper respiratory tract infections caused by bacteria should be treated with antibacterial drugs (e.g., cefaclor). If Kawasaki disease is present, the above symptoms may be accompanied by skin rashes, hard swelling of the hands and feet, and chapped lips, etc., and the treatment requires the use of gammaglobulin and aspirin. All of the above medications should be used under the supervision of a physician, and it is recommended to actively consult a specialist for treatment.