Tracheitis is an inflammation of the tracheal mucosa due to infection, environmental irritation, smoking, etc. Coughing occurs when the mucous membrane of the trachea is damaged by infection, environmental irritation, or smoking. 1. Tracheitis is caused by infection, environmental irritation, smoking, etc., which causes damage to the tracheal mucosa, resulting in impairment of its normal function, which can be stimulated by the passage of gases through the damaged tracheal mucosa, resulting in a series of symptoms. 2. Cough is a typical symptom of bronchitis, and some people produce sputum due to infection. It is recommended to consult a doctor in a timely manner, to make a clear diagnosis after examination, and to carry out scientific treatment according to the doctor’s instructions.