Why do you cough whenever you breathe in cold air

Cough as soon as you inhale cool air, indicating that the trachea is sensitive to the outside air, and it may be caused by inhaling allergic substances. The possibility of variant bronchial asthma cannot be ruled out; you should do a good job of nursing your mouth and nose at ordinary times, and go to the respiratory department of a regular hospital for blood routine and bronchoscopy.