When children have a lot of phlegm, they can go to the hospital for a clear diagnosis, take oral medication, and pay attention to diet, etc. The specific treatment methods are as follows: First, it is best to take children to the hospital for relevant examinations, and take corresponding auxiliary examinations, such as blood tests, after the clinician’s examination to clarify the causes of phlegm, so that the corresponding medication for the causes can be taken for treatment under the doctor’s guidance. Second, according to the specific situation of children with excessive phlegm, they can be treated with oral phlegm-reducing drugs, both Chinese and Western medicines. Third, when phlegm is abundant, diet is recommended to be light and easy to digest. It is recommended to give the child more water and feed him/her regularly. At the same time, it is necessary to avoid oral intake of fish, shrimp, eggs, beef, mutton and other hairy substances, otherwise it is easy to aggravate the phenomenon of phlegm in children. Fourth, if it is considered to be formed by the decline of immune function, if necessary, you can jointly apply drugs to improve immunity, which can make the child’s phlegm phenomenon shorten rapidly.