Want to know whether your lungs are good or not, you can know through two aspects: 1, self-assessment, if you usually love coughing, coughing up sputum or shortness of breath after activities, especially long-term coughing, coughing up sputum, shortness of breath, mostly in spring and fall seasonal changes in the obvious, the lungs will certainly have certain problems; 2, you can do the examination, check the lung imaging, CT or chest X-ray can be clear lungs have no growth, there is no bronchial dilatation or interstitial disease and other organic problems. or interstitial lung disease and other organic problems. You can also do pulmonary function test, mainly to assess the lung function, to see how the lung ventilation, how the lung capacity, how the lung’s compensatory function, and whether there is any problem with the small airways. If the CT or lung function suggests no problem, it means that the lung is normal. Lung function should also be protected by avoiding exposure to dust and staying away from dusty environments and places where smoking occurs, because dust and smoking have a certain impact on the lungs or lung function.