If a child’s cough is still bad after several months, most of them belong to the symptoms caused by chronic cough and can be treated with the following measures: 1. Chest X-ray: It can be initially determined whether the cough that does not heal for a long time is caused by a lung infection or by other causes. If there are no abnormalities in the chest radiograph, no bronchial foreign bodies, and no large solid shadows in the lungs, most coughs are common chronic coughs, such as coughs caused by cough variant asthma, or coughs caused by allergic coughs. 2. Other measures: Do allergen testing and bronchial excitation tests for children, and apply nebulizer inhalation therapy.