Most one-year-old babies with colds are caused by viral infections, and the following methods can be used when nasal congestion is caused: 1. Local application of ribavirin spray or interferon spray for the mouth and nose, once every hour, is more effective when applied in the first three days of the disease. 2. If the fontanelle is not closed, you can use chopped onion and scallion wrapped in a thin cloth, warmed and applied to the fontanelle, which has an enlightening effect. 3. 4.If nasal congestion obviously affects sleep, you can apply ephedrine nasal drops if necessary to reduce mucosal edema, this drug is a short-term application of a small amount, not long-term application.