The cold and dry air in winter and spring makes it a good season for colds and flu. Most of the symptoms are upper respiratory tract symptoms with fever. Once a fever breaks out, most people panic and blindly take oral “antipyretics” or even infusions, hormones and antibacterials. It is wrong to use medicine blindly. The correct treatment should consult a doctor and ask him/her to guide the use of medication. 1, the cold is caused by the common respiratory virus invasion of the upper respiratory tract, antibacterial treatment is ineffective, the role of the current antiviral drugs is limited, rely on the patient’s own resistance to destroy the invasive virus, about 3-7 days to recover on their own, that is, the virus infection has a self-limiting. 2, fever is the performance of the body and virus game, is a good means to mobilize their own resistance, maintain the appropriate body temperature, will be conducive to the recovery of the disease. Just like when we have an inflammation in a certain part, give hot compress, inflammation quickly subside, fever response is equivalent to the whole body “hot compress”, maintain the appropriate body temperature is necessary when the cold. 3. Once the patients who are in good health have a cold, they can take heat preservation, rest, drink more boiled water, and take oral Chinese medicine with anti-viral effect and dispel wind and cold. Some of the aggravation or long time does not heal is due to not enough rest, insulation incurred heavy feeling. Therefore, it is more important to rest and keep warm than to use any medicine. Children, the elderly and the frail should immediately go to the hospital to do the relevant tests to determine whether the combined pneumonia or recurrence of old diseases, so as not to miss the time of diagnosis and treatment. 3.What is the appropriate body temperature? Body temperature between 36-38.5℃ is good for the body, but if it exceeds 39℃, active antipyretic measures should be taken. When the body temperature is 38-39℃ accompanied by obvious headache, muscle pain and other uncomfortable symptoms, oral antipyretic and analgesic drugs can be used for symptomatic treatment, try not to use antibacterial agents, hormones, etc., so as not to weaken the body’s resistance, prolong the course of the disease, and even pneumonia and other complications.