The flu is a viral infection caused by the upper whistle tract infection, patients should start treatment from both diet and oral medication. 1, in the diet, patients need a light diet, drink more water, eat more food rich in vitamin C, E, namely fresh vegetables and fruits, avoid eating too greasy, indigestible food, while paying attention to quit smoking, quit drinking, more rest, give the body a sufficient recuperation environment. In general, the common cold can be cured by itself in about 1 week. 2, in terms of drugs, patients can take some symptomatic drugs orally according to the symptoms of the cold, such as cough, runny nose can be given pseudoephedrine drugs to reduce nasal congestion, fever can be given antipyretic analgesics (such as aspirin, paracetamol, etc.) to reduce body temperature. In addition, antiviral drugs (such as oseltamivir capsules) or some herbal preparations can also be used to help improve symptoms and shorten the course of the disease. For patients with secondary bacterial infections, they should be treated with antibiotics, often using penicillin, cephalosporins, and quinolones. However, care should be taken not to abuse antiviral drugs and antibiotics, which should be used under the guidance of a medical professional. The best way to prevent colds is to strengthen exercise, enhance physical fitness, improve nutrition and avoid overexertion to improve immunity.