Influenza A is the nail type flu. If infected with influenza A virus for three days and recurrent fever, should cooperate with professional doctors to give antiviral treatment, symptomatic supportive treatment and so on. 1. Antiviral treatment: If you have had influenza A for three days and have a recurring fever, you should apply antiviral drugs under the guidance of a professional doctor, such as oseltamivir and zanamivir. 2. Symptomatic supportive treatment: If the fever caused by influenza A is not more than 38.5 ℃, physical cooling can be carried out, such as applying fever-reducing patches, taking a warm bath and so on. If the fever is more than 38.5 ℃, you should take antipyretic drugs, such as ibuprofen, under the guidance of a professional doctor. If influenza A causes cough, also give cough treatment, commonly used drugs such as dextromethorphan. If you have influenza A three days repeated fever, it is recommended to go to the respiratory department of the regular hospital as soon as possible, and actively cooperate with professional doctors to standardize the treatment, prompting the condition to improve as soon as possible.