In children, coughing up sputum is usually considered to be due to small bronchial lesions in the lungs or sticky sputum, which can be followed up by symptomatic treatment. 1. Tapping the child’s chest, side or back before and after meals can promote the loosening of phlegm and increase its mobility. 2. Treatment can be carried out through nebulization. Commonly used nebulizing drugs include budesonide and salbutamol, which help dilate the airway, and acetylcysteine and tranylcypromine hydrochloride, which help dilute sputum and facilitate its expulsion. 3. If sputum embolism is formed, if necessary, bronchoscopy can be performed under the guidance of a doctor, and irrigation treatment can be performed microscopically. In addition, attention should be paid to balanced nutrition in life. The above drugs should be used under the guidance of a doctor.