Colds are very common, mostly caused by viruses due to respiratory tract infections on the basis of overexertion and cold. Among the viruses that cause colds, influenza virus and rhinovirus are the main viruses that cause acute attacks of colds and LSI in China; parainfluenza virus, adenovirus, respiratory syncytial virus, etc. can also cause colds. In mild cases, the symptoms are only nasal congestion, runny nose, dry throat, sore throat and other discomforts. If there is fever, cough, sputum and generalized aches and pains, the trachea and bronchial tubes are mostly affected. Sometimes, elderly people may feel tired and fatigued, or only slightly dizzy and drowsy, but if they are not treated at this time, coughing and sputum production will occur; if elderly people have suffered from “chronic bronchitis” in the past, they may be mistaken for an acute attack of chronic bronchitis. Due to the declining function of the respiratory system and the decline of the immunity of the whole body, the elderly are not only susceptible to colds, but also have colds complicated by bronchitis, pneumonia, and even secondary lung abscesses; if the original lung disease, it will aggravate the original condition; those who have heart disease will worsen the original heart disease, which will induce angina pectoris and cardiac insufficiency. In addition, after the elderly have a cold, recovery is significantly slower than young people, more in 2-3 weeks to get the basic recovery, some need several months of time, weakness and fatigue around the body, dizziness and other symptoms to completely disappear. It can be seen that the prevention of colds is more important than the treatment of colds. To prevent the occurrence of colds, it is important to take effective preventive measures in advance. In addition, you should try to go to places with a large number of mobile people, such as shopping malls, stations and fairs, to prevent being infected with colds and other germs.