Colds six or seven times a year, when they occur in adults, usually reflect a low level of immunity. It is normal for children to have six or seven colds a year. In general, it is normal to have less than four colds a year. If an adult has six or seven colds a year, it is clearly not normal. However, children’s resistance is not as good as that of adults, especially at the change of seasons, sudden drop in temperature, and attacked by external pathogens, all of which may cause colds, and the number of colds in a year will be more, and six or seven colds are also normal. If the number of colds in a year is too many, frequent illnesses, indicating that the body’s immunity is low, it is recommended that appropriate sports and exercise to enhance personal fitness, improve the body’s immunity and prevent colds. Usually should pay attention to keep warm, do a good job of dietary management, to ensure that the supply of dietary nutrients, help to enhance the body’s immunity.