Patients feel the pain on both sides of the trachea is their own subjective feelings, clinically seen in many causes, the most common is the inflammatory reaction of the airway, the mucosa of the trachea has been damaged, the mucosa is congested, edema, or even broken, inflammatory secretion oozing. Common diseases are acute exacerbation of chronic bronchitis, acute bronchitis, and endobronchial tuberculosis caused by Mycobacterium tuberculosis infection, which is then caused by infectious factors. There are also non-infectious factors, such as bronchial stones, bronchial tumors, which are also relatively rare diseases, and can be diagnosed clinically by taking X-rays of both lungs, and bronchial fiberoptic endoscopy can be done if necessary.