When a baby coughs when there is a lot of phlegm, due to the baby’s young age or the fact that most of the small children do not cough up phlegm, the phlegm will block the throat, thus causing the symptoms of coughing, and the child will also show discomfort. This situation can be given: 1. appropriate amount of diligent feeding and drinking more water to keep the respiratory tract in a moist state, which is conducive to the dilution and discharge of phlegm. 2. parents can give their children diligent back-buttoning treatment, knocking the back more from the bottom of the lungs to the tip of the lungs, and more back-buttoning, which is conducive to the dilution of phlegm and the discharge and absorption of phlegm. 3. oral medication to reduce phlegm and stop coughing, such as aminoglutethimide oral solution or pulmonary cough combination for oral administration, which is conducive to the absorption of phlegm. 4.Nebulized inhalation treatment can be given, nebulized inhalation can directly bring the effect of phlegm-suppressing drugs to the airway, which is conducive to the absorption of phlegm and the wetting of phlegm, thus more conducive to absorption. 5.If there is no obvious effect by oral drugs and other auxiliary measures, it is necessary to take the child to the hospital for intravenous infusion treatment if necessary.