Self-assessment of lung health can be determined by self-testing or going to the hospital to improve the relevant examination. 1. Self-testing: You can judge by your own symptoms, such as coughing, coughing up sputum, blood in sputum, chest tightness, tightness of breath, chest pain, shortness of breath after activity, dyspnea and other symptoms. Can also be judged by the frequency of breathing, generally 12-20 times per minute is normal, such as respiratory frequency is too fast, generally can be manifested as shortness of breath and other symptoms. 2. Improve the relevant examination in hospital: You can go to the hospital to improve the chest X-ray or CT examination to observe whether there are lesions in the airway and lungs, such as inflammation, nodules, masses, pleural effusion, etc. You can also improve the pulmonary function test to evaluate the symptoms of dyspnea. Lung function tests can also be performed to assess lung respiration, which can determine whether there is obstructive ventilatory dysfunction, airway hyperresponsiveness and restrictive diseases. There are other ways to self-test whether the lungs are healthy or not. If lung discomfort occurs, it is recommended to consult a doctor in time, and under the doctor’s guidance, improve the relevant examination to clarify whether there are lung lesions, so as to avoid delaying the condition.