Instead of smoking after coughing may be due to pharyngitis, the body’s own defense and other reasons. 1. pharyngitis: smoking will cause irritation to the local pharyngeal mucosal tissues, thus causing symptoms such as dry throat, itchy throat, irritating cough, triggering pharyngitis. 2. The body’s own defense: do not smoke, the lungs will have a period of time to discharge the deposits accumulated in the alveoli, bronchial tubes, and will cough up some black or gray mucus, which is the human body in the self-purification, self-repair, self-protection process, the process of time depending on the length of the individual smoking. After not smoking but coughing may also be a combination of other diseases that cause coughing, and whether or not smoking has nothing to do with, if there are other discomforts, it is recommended that the patient to the hospital in time, under the guidance of the doctor to standardize the treatment.