When the airflow passes through the narrow airway, it is easy to make a metallic cough, which is mainly suggestive of airway obstruction and narrowing, mostly due to chronic obstructive pulmonary disease, mediastinal tumors, bronchial asthma and other diseases. If there is an irritating choking cough, it is also necessary to consider that the cough is caused by inflammation of the throat and trachea and allergy, the first step is to use anti-allergy and anti-inflammatory drugs to actively treat. If there is no improvement, you need to go to the hospital for a comprehensive examination, CT examination of the lungs, lung puncture and bronchoscopy, and then make a correct diagnosis according to the results of the examination. If the condition is caused by bronchial tumor, most of the cases need to be treated by surgery. After the surgery, regular chemotherapy is also needed, as well as regular checkups at the hospital.