A chirping sound in the airways may be caused by bronchial asthma, bronchitis, pneumonia or chronic obstructive pulmonary disease. 1. Bronchial asthma: usually caused by environmental factors, genetic factors, respiratory tract infections, etc., resulting in increased reactivity of the airways compared to normal, the patient will experience reversible airflow limitation, and diffuse rales can be heard on lung auscultation. 2. Bronchitis: When the patient’s body resistance drops, he may be attacked by bacteria and other pathogens, triggering an increase in sputum. As the phlegm is blocked in the trachea, the sticky phlegm can not be discharged in time, which will lead to the emergence of tracheal rales. 3. Pneumonia: It may be caused by Staphylococcus aureus, which leads to an increase in airway secretions. When inhaling, the airflow forms turbulence through the secretion-containing airway, and a chirping sound in the trachea occurs. 4. Chronic Obstructive Pulmonary Disease (COPD): Inflammatory infections may be induced by smoking, air pollution, respiratory infections, and hereditary factors, resulting in an increase in bronchial secretions and the development of tracheal tinnitus. There may also be other reasons for the sound of the trachea, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.