On rainy days, children’s runny noses can be seen in allergic rhinitis, upper respiratory tract infections and so on. 1. Allergic rhinitis: because of the rainy days, the temperature is relatively low, the cold air stimulates the nasal cavity, easily induced rhinitis attack, when the child suffers from rhinitis, it is easy to sneeze, runny nose symptoms. 2. Upper respiratory tract infections: children’s resistance is weak, in the rainy days and other low temperature weather is easy to suffer from upper respiratory tract infections, so the symptoms of a runny nose, accompanied by fever, sore throat, fatigue and so on. Children on the runny nose is recommended to hospital pediatrics, identify the cause of the disease, targeted treatment, daily life should pay attention to balanced nutrition, more outdoor activities, increase the amount of exercise, improve immunity.