Clinically, children are very prone to recurrent colds, especially in preschoolers. Because of this period, the child’s immune system is in the establishment period, so once a viral infection occurs, there will be high fever and even febrile convulsions. The first point is the prevention of infectious sources, because colds are transmitted from person to person, and there are also some seasonal airborne infections, so for the high incidence of colds, such children should not go to places with too many people indoors, and they must wash their hands thoroughly after coming back. For contact with infected patients, children must wear a mask, which is controlled from the perspective of the source of infection. The second point is to enhance the physical fitness of the patient, enhance the physical fitness mainly from sleep and enhance nutrition, exercise three aspects to strengthen, must eat more vegetables, fruits, give the child more exercise, so that the child resistance can be good. The third point is to get vaccinated against influenza. If a child has a recurring cold, getting vaccinated against influenza is an effective and definite way to prevent influenza.