Influenza A with high fever of 40℃ is firstly given antiviral treatment, followed by medication to reduce heat treatment. Once again, you can use proprietary Chinese medicines to treat it, and replenish more water. Influenza A high fever is a common clinical manifestation, first of all, should be given effective antiviral drugs such as oseltamivir, abidol, and it is best to use within 36 hours, so that the effect is better. Secondly, antipyretic drugs such as ibuprofen, acetaminophen, Xiao Chaihu granules, aspirin can be used for high fever. Once again, you can use proprietary Chinese medicines, such as Shuanfeng and detoxification capsule, Lianhua Qingdian granules, Bairui granules, and antiviral granules, etc., which can be effective in clearing heat and detoxifying the toxin. This kind of patients should carry out respiratory isolation treatment, more hydration, you can take oral rehydration salts, at the same time, appropriate to strengthen the nutrition, pay more attention to rest, which will help the recovery of the condition. Specific medication should be used under the guidance of a doctor.