Tracheal stenosis may occur in bouts of lightness and severity, depending on the cause. Airway stenosis can be caused by scarring after tracheotomy, endotracheal lesions, and peritracheal lesions that compress the trachea, When there is a respiratory infection, the increase in airway secretions can aggravate the stenosis and lead to worsening of the symptoms, and the symptoms of stenosis will be reduced after expectoration. Airway stenosis can also be caused by bronchial asthma, which is characterized by reversible airflow limitation. When an acute attack of asthma occurs, bronchial smooth muscle spasm can occur, leading to airway narrowing and causing dyspnea. If bronchodilators are used or the asthma is stabilized, the airways will return to normal and the symptoms of dyspnea may be reduced. Airway stenosis needs to be diagnosed with the help of chest CT, lung function or bronchoscopy. If there is airway stenosis, it is recommended to consult a doctor in time to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.