The clinical symptoms of different lung diseases are also different: 1. Pneumonia mainly manifests as cough, yellow sputum, fever, and severe pneumonia with chest pain, coughing blood and dyspnea. 2. Tuberculosis mainly manifests as symptoms of tuberculosis poisoning such as low fever, weakness, night sweats, and wasting. 3. Bronchial asthma mainly manifests as sudden onset of expiratory dyspnea, and extensive dry rales can be heard in both lungs during the attack. 4.Lung tumor, mainly manifested as cough, coughing sputum, fever, chest pain, coughing blood, dyspnea, wasting, etc. 5.Chronic obstructive pulmonary disease, mostly manifested as recurrent attacks of cough, coughing sputum, shortness of breath, the condition is prolonged and gradually aggravated.