The main daily manifestations of bad airways include chest pain, dyspnea, and chest tightness, as well as coughing, phlegm, and a foreign body sensation in the throat. Common diseases that cause trachea problems include acute bronchitis, chronic obstructive pulmonary disease, and chronic bronchitis. 1. Acute tracheobronchitis: the trachea and bronchial tubes show mucosal congestion, edema, increased secretion, ciliated epithelial cell damage and detachment, and localized mucosal inflammatory infiltration. It is often characterized by nasal congestion, sore throat, runny nose, hoarseness, fever, cough and sputum. Some patients may experience shortness of breath and chest tightness. This disease is mainly caused by bacterial or viral infections. Physical, chemical or allergic factors may also cause the disease. 2. Chronic bronchitis: The main clinical symptoms are recurrent cough and sputum, occasionally wheezing, and most of the sputum is white foamy sputum. Most of the sputum is white foamy sputum. When accompanied by respiratory tract infections, the sputum may be purulent or bloodstained. It is common in elderly smokers. 3. Chronic Obstructive Pulmonary Disease (COPD): It is mainly caused by the proliferation of respiratory epithelium and airway remodeling, resulting in chronic airway obstruction. It is often characterized by frequent coughing, wheezing, coughing up sputum, chest tightness and shortness of breath. Smoking, air pollution, occupational dust, recurrent respiratory infections, etc. can lead to bad airways, if the above symptoms occur, it is recommended to seek timely medical attention to avoid delays in the condition.