If a child has a prolonged cough, a chest CT examination should be done to rule out bronchitis or pneumonia. If bronchitis or pneumonia occurs, the effect of oral medication at home is not very good, so the child must be taken to the hospital for inpatient treatment, sputum culture should be done during hospitalization, and according to the results of the drug sensitivity test, appropriate and sensitive antibiotics should be selected for intravenous drip treatment. If there is no significant abnormality in the chest CT and blood tests, it is also possible that the child has cough variant asthma, and a bronchodilator test or bronchial excitation test should be performed. Chewable tablets and nebulized inhalation of terbutaline sulfate and budesonide are needed to treat and relieve asthma attacks.