Tonsillitis infusion for 4 days, but again cold and fever, may be the local bacterial infection is not completely inhibited caused by the need to continue to fight infection, if necessary, but also active symptomatic treatment and physical cooling. 1. Anti-infection: tonsillitis infusion for 4 days to improve but again cold and fever, you can follow the doctor’s instructions to use levofloxacin, tinidazole or cefprozil and other antibiotics to continue anti-infection treatment, but also with the use of dibutyl granules and other heat detoxification of proprietary Chinese medicines. 2. Symptomatic treatment: if headache, fatigue and other symptoms, you can take ibuprofen and other pain medication to relieve symptoms. 3. Physical cooling: you can also use a cool towel to wipe the forehead, armpits and other parts of the physical cooling to prevent high body temperature. Tonsillitis after infusion treatment, the condition may recur, need to standardize the treatment under the guidance of the doctor, but also pay attention to a light diet and drink plenty of water, to avoid the stimulation of adverse factors, etc., to help restore normal.