Children’s cough and phlegm are commonly found in the middle and late stages of external infection, bronchitis, pneumonia and other disease processes, often accompanied by infection, fever and other symptoms. Medication, physical therapy and dietary therapy methods, as an auxiliary method to resolve phlegm and stop coughing at a later stage, can well help children recover their lung function and reduce the symptoms of sputum and unpleasant coughing due to tracheal and bronchial inflammation. Commonly used methods to dissolve phlegm include: 1.Medication: according to the nature of the child’s cough and phlegm, choose drugs to stop cough and dissolve phlegm, clear heat and phlegm, and benefit qi and expectoration. 2.Physical treatment: Ultrasonic nebulization can help the expulsion of phlegm; patting the back of children for 15 minutes a day can also effectively reduce coughing and help the expulsion of phlegm; steam inhalation can dilute phlegm for easy coughing, and also reduce the congestion and edema of tracheal and bronchial mucosa and reduce coughing. 3. Food treatment: (1) Cold phlegm: Take radish and honey drink hot down. 1 to 2 times daily. It is most suitable for wind-cold coughs. (2) Dry phlegm: Steamed pear with Chuanbei mum will be steamed through and eaten together with Chuanbei mum in it. (3) Hot phlegm: Water chestnut and lily soup is served warm. Drinking more water can also dilute mucus secretion and make it easy to be coughed out. Drinking water can also improve blood circulation, so that the body metabolites and toxins from the urine, thus reducing the irritation of the respiratory mucosa.