1.What is dyspnea? Dyspnea (shortness of breath, wheezing, etc.) is an important manifestation of respiratory insufficiency. Patients subjectively feel the lack of air, objectively manifest as labored breathing, shortness of breath, etc. In severe cases, nasal flapping, cyanosis, and telescopic breathing may occur. 2.Which diseases are included in dyspnea caused by lung diseases? In many cases, dyspnea is caused by respiratory system diseases. Dyspnea of pulmonary origin mainly includes: upper respiratory tract diseases (abscess of the posterior pharyngeal wall, enlarged tonsils, laryngeal foreign body, laryngeal edema, laryngeal cancer, etc.), bronchial diseases (stenosis and obstruction due to bronchitis, bronchial asthma, bronchiectasis, bronchial foreign bodies and tumors, etc.), lung diseases (chronic obstructive pulmonary disease, various types of pneumonia, pulmonary tuberculosis, pulmonary stasis, pulmonary atelectasis, pulmonary edema, pulmonary cyst, pulmonary infarction, lung cancer, nodular disease, pulmonary fibrosis, acute respiratory distress syndrome, etc.), pleural diseases (spontaneous pneumothorax, massive pleural effusion, severe pleural adhesion thickening, pleural mesenchymal tumor, etc.). 3.What should you do if you have symptoms of dyspnea? You should promptly consult the pulmonology department (respiratory department), and the specialist will examine and evaluate your condition, as well as the corresponding examination items, such as: chest X-ray or CT examination to exclude tracheal and pulmonary lesions; lung function test for the diagnosis and condition evaluation of chronic lung diseases such as chronic obstructive pulmonary disease (COPD) and bronchial asthma; fiberoptic bronchoscopy for the diagnosis and treatment of bronchial tumors, stenosis, and Fibrobronchoscopy is used for the diagnosis and treatment of bronchial tumors, stenosis, foreign bodies, etc. You may also need an electrocardiogram, echocardiogram, etc. to rule out cardiogenic dyspnea.