Children cough repeatedly bad to common such as bronchial dilatation, pneumonia, allergic cough, etc., it is recommended to identify the cause of the disease to take medication. 1. Bronchial dilatation: it is a common disease in children, which can be accompanied by repeated coughing and a large amount of purulent sputum. Oral amoxicillin should be taken under the guidance of the doctor to control the infection, or nebulized saline inhalation to make sputum discharge. Oral bronchodilators such as salbutamol and terbutaline can also be taken. 2. Pneumonia: It is an inflammatory disease of the lungs of children caused by viruses or bacteria, which may cause cough and other symptoms. If caused by viral infection, you can follow the doctor’s instructions to apply ribavirin, oseltamivir phosphate and other drugs; bacterial infections caused by oral amoxicillin and other drugs; Mycoplasma pneumoniae infection with azithromycin and other drugs. 3. Allergic cough: the cause is unknown, mostly dry cough. Cetirizine, loratadine and other anti-allergy drugs can be applied under the guidance of doctors. At the same time, clear allergens, avoid re-exposure to allergic substances. Children with recurring coughs should be treated by a medical professional after identifying the cause of the cough to avoid delaying the condition. All of the above drugs should be used under the guidance of a doctor, avoid self-medication.