You can wash your hair when you have a fever, and washing your hair can relieve fatigue and have a certain fever-reducing effect, but pay attention to the cold and warmth, in order to prevent heavy sensations from occurring. Fever should be based on a light diet, eat more vegetables, fruits, less spicy, stimulating, greasy food, avoid fish, shrimp, seafood food, so as not to help the fire phlegm caused by coughing symptoms, resulting in prolonged illness. If the fever is caused by cold and flu, you can take Meigai Pseudo-Ma capsule, Benoit dispersible tablets, compound aminophenol alkylamine tablets and other anti-flu medicines, which can treat and alleviate the symptoms of fever caused by the common cold and influenza. If the temperature exceeds 38.5℃, you can take ibuprofen, acetaminophen or indomethacin suppository, which has the effect of antipyretic and analgesic, and can play the role of rapid fever reduction, you can also take Pu Di Lan oral liquid, blue scutellaria oral liquid, Qing Kailing granules, Banlangen granules, antelope horn punch, and other drugs to clear away heat and detoxify the toxin.