Most pediatric colds are pediatric upper respiratory tract infections. Upper respiratory tract refers to infections of the nose, throat and pharynx, and if the infection spreads downward it can cause tracheitis, bronchitis or pneumonia. Most of them are viral infections, and a few are caused by streptococcus, pneumococcus, and H. influenzae. Cold weather, human resistance is reduced, indoor ventilation is not, it is easy to cause the spread of cold virus, and weak resistance of infants and children are most likely to be infected. 1, pay attention to the increase or decrease of clothing to avoid the onset of triggers: too much or too little clothing, sudden changes in weather, environmental pollution and passive smoking, etc., are the triggers of upper respiratory tract infections, should pay attention to prevention. Pay attention to the timely increase or decrease of clothes for the baby, but do not wear too much. 2, to avoid cross-infection less go to public places: contact with sick children to wash their hands, if necessary, wear isolation clothes, isolation not only to protect neighboring children, but also to reduce the occurrence of complications in sick children, in general child care institutions and hospitals can be implemented, in the family adult patients to avoid contact with healthy children. In winter, try to take your baby to those public places with many people and bad air. 3, indoor temperature and humidity should be appropriate often open the window ventilation: keep the indoor temperature between 20 to 23 degrees Celsius, should not be too hot; maintain indoor humidity, often open the window ventilation, to ensure the circulation of air in the room. 4, drink more water active exercise: let children drink more water is very important, the use of natural factors to exercise physical fitness is very important, such as frequent open windows to sleep, outdoor activities and sports, etc., are positive methods, as long as persistent, often carried out, can enhance physical fitness, prevent upper respiratory tract infections. 5, vaccination: Recently, it is believed that the application of attenuated virus vaccine, dripping from the nasal cavity or nebulized inhalation, can stimulate the production of secretory IgA antibodies in the nasal cavity and upper respiratory tract mucosa performance, thus enhancing the defense of the respiratory tract against infection. Vaccine prophylaxis is rarely possible due to the large number of enterovirus and rhinovirus types. Colds are the “source of all diseases” of infectious diseases in children. Many pediatric infectious diseases such as measles, chickenpox, early childhood acute rash, mumps and epidemic meningitis, as well as viral myocarditis have early symptoms of “cold”. In addition, the upper sense can also cause acute nephritis and rheumatic fever.