Coughing in the cold can be caused by a variety of reasons, such as bronchial infections and allergic coughs. 1. Bronchial infection: bronchial infection may occur after exposure to cold, leading to high respiratory tract reaction, which causes bronchial mucous membrane contraction and coughing symptoms. 2. Allergic cough: these patients are mainly due to airway hypersensitivity to cold air, resulting in irritating cough as soon as the airway is exposed to cold. Usually pay attention to keep warm, avoid cold. Cold cough may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.