There are many reasons for coughing after smoking, commonly found in chronic pharyngitis, chronic bronchitis, lung diseases, etc. It is recommended that a clear diagnosis and active treatment. 1. Chronic pharyngitis: Chronic pharyngitis is a chronic diffuse inflammation of the pharyngeal mucosa and submucosal tissues, which often has a long course of disease, persistent and recurrent. Smoking can stimulate the pharyngeal mucosa, exacerbate the inflammatory response and cause patients to cough. 2. Chronic bronchitis: chronic bronchitis is a common clinical disease, most of which are caused by smoking, and a few are caused by infection. When patients with chronic bronchitis smoke, the irritation of the smoke stimulates and causes the patient to cough. 3. Lung diseases: If there are lung diseases, such as chronic obstructive pulmonary disease, emphysema, lung malignant tumors, may also lead to cough when smoking. It is recommended to go to the hospital for relevant examinations to find out whether it is related to the above diseases. There are many reasons for coughing right after smoking. It is recommended to reduce smoking and go to the hospital if necessary to get a clear diagnosis and treatment under the doctor’s guidance.