High fever of influenza A can be cooled down, antiviral treatment, etc., including oral ibuprofen suspension and oral antiviral drugs. 1. Cooling: physical cooling methods can be used, wrapped in a towel with ice, placed on the forehead. If the body temperature is over 38.5℃, oral ibuprofen suspension can be taken to reduce the fever as prescribed by the doctor. If the fever is recurrent, the medicine can be taken again after an interval of 4-6 hours from the first time of taking the medicine, but the medicine is not taken more than 4 times in 24 hours. 2. Antiviral drugs: should be used within 48 hours, can be used oseltamivir, can inhibit viral replication, reduce symptoms. The safety and efficacy of this drug in children under 1 year of age have not been established, and it is not a substitute for the influenza vaccine. Adverse reactions are mostly nausea and vomiting, which are transient and often occur with the first dose. In addition, it is important to rest, drink plenty of fluids, increase nutrition, and eat easy-to-digest foods. All of the above medications should be taken under the supervision of a doctor.