Repeated coughing in children may be caused by allergic cough, pneumonia and other reasons. 1. Allergic cough: it refers to the people with allergic constitution after exposure to certain triggering factors, mainly manifested as long-term paroxysmal, irritating dry cough, which may be accompanied by foreign body sensation or itching in the throat. It will lead to recurrent coughing in children, and patients should stay away from allergens and undergo medication. 2. Pneumonia: refers to the inflammation of the terminal airways, alveoli and interstitium of the lungs, which can be caused by pathogenic microorganisms, physical and chemical factors or immune injury. The main clinical symptoms are fever, chills, cough and sputum, which may be accompanied by chest pain and dyspnea. It will make the child suffer from recurrent coughing symptoms. Children with recurrent cough may have other reasons, it is recommended to consult a doctor in time to clarify the cause of the disease and standardize the treatment.