When a 4-month-old child has symptoms of cold and cough and nasal congestion, different treatment measures can be chosen according to the severity of the child’s symptoms: 1. Clinically, for children with mild symptoms of cold and cough and nasal congestion, the main measures to relieve the symptoms are to drink more water, pay attention to keeping warm, and open the windows 2-3 times a day to ventilate the room. In addition to the above methods, parents should also give their children medication under the diagnosis of a physician if the symptoms of cold and cough and nasal congestion are serious, such as aminophenol xanthamine granules and pediatric cough and phlegm granules for treatment, as well as Chinese medicine rhinitis pellets to relieve the symptoms of nasal congestion, fresh bamboo liquid or cough syrup to relieve the symptoms of cough.