Bad lungs may be suffering from lung diseases such as chronic obstructive pulmonary disease (COPD), pneumoconiosis, chronic bronchitis and bronchiectasis, and common symptoms include coughing, coughing up phlegm, chest tightness, shortness of breath, shortness of breath, chest pain and hemoptysis. 1. Coughing, coughing up phlegm: Lungs are the respiratory organs of the human body, bad lungs will appear coughing, coughing up phlegm, usually caused by respiratory secretions and inflammation stimulation. 2. Chest tightness and shortness of breath: chest tightness and shortness of breath will occur in bad lungs, which may be caused by lung pathology leading to impaired lung ventilation and gas exchange and hypoxia. 3. Shortness of breath: shortness of breath occurs in bad lungs, mainly due to the lack of oxygen caused by impaired gas exchange, which reflexively causes shortness of breath. 4. Chest pain: bad lungs can involve neighboring organs, such as long-term pulmonary hypertension, will lead to myocardial damage and chest pain, may also be due to lung lesions, such as inflammation involving the pleura can lead to chest pain. 5. hemoptysis: if bad lungs are caused by lung abscess, lung cancer, tuberculosis, bronchiectasis and other diseases, these diseases can often cause capillary rupture and bleeding in the lung lesions, resulting in hemoptysis. When the patient cough, cough sputum, chest tightness, shortness of breath, shortness of breath and hemoptysis and other symptoms, more consideration of lung disease, it is recommended to go to the hospital to do the relevant examination, to clarify the cause of the standardized treatment.