Coughing in children after bronchopneumonia has resolved may be due to a new bronchial infection in the hospital or allergic symptoms caused by some physical or chemical factors or still in a state of irritability. Bronchopneumonia is common in children and adolescents and is a common disease in respiratory medicine or pediatrics. It is a common disease in respiratory medicine and pediatrics, especially during the change of seasons or cold weather, due to the incomplete development of children and their low immunity. They are very susceptible to this disease. Bronchopneumonia has a series of pathologic changes that can lead to constant coughing, sputum and shortness of breath, while inflammatory mediators can cause fever, chest pain and indigestion. If the child’s bronchial pneumonia is cured, it may cause a persistent cough because the bronchial mucosa has not fully recovered to its original condition or because it has developed an allergy to certain physical and chemical factors such as cold air, smoke, pollen, etc., or because of an inadvertent new infection. At this time, there is no need to rush to the hospital, you can drink more water, or out of the current environment. If there is no relief, you can go to the hospital again to identify the cause of the disease for diagnosis and treatment.