When babies have phlegm in the throat and nasal congestion, most of them are due to respiratory diseases such as acute upper respiratory tract infection, bronchitis or pneumonia. The specific treatment methods are as follows: 1. give oral cold and phlegm medication according to the baby’s condition. 2. apply vitamin AD drops 1-2 times a day into the baby’s nasal cavity to soften nasal secretions, so that nasal secretions can flow out on their own and relieve the symptoms of nasal congestion. 3. The nebulized inhalation treatment is carried out with the drugs that moisten the airway. Nebulized inhalation drugs can act directly on the nasal part of the throat, which can effectively promote the absorption of phlegm, as well as promote the discharge of nasal secretions, thus relieving the symptoms of nasal congestion.