Knowing that you have a cold should pay attention to rest, drink more water, and take medication if necessary. Colds are mainly caused by rain, exertion, cold and other reasons to reduce the body’s immunity, viral infection caused by upper respiratory tract symptoms, such as nasal congestion, runny nose, cough and so on. Colds are self-healing and usually last 5-7 days. After getting a cold, you should pay attention to rest, keep warm, avoid wind and cold, drink more water, eat a light diet, and keep indoor air circulation. There are no effective antiviral drugs, and the treatment of colds is mainly symptomatic. For those with nasal congestion and runny nose, pseudoephedrine can be taken to reduce nasal congestion. If you have a cough, you can take cough suppressants, such as dextromethorphan. Fever, body pain, can take antipyretic and analgesic drugs, such as aspirin, ibuprofen, acetaminophen, etc. It should be noted that pediatric colds should not be used aspirin, in order to prevent Reye’s syndrome. Cold symptoms are generally mild and self-curing, if the symptoms are heavy, or not well for a long time, you should go to the hospital in time to improve the blood test, chest X-ray and other tests, treatment under the guidance of the doctor, to avoid delayed treatment.