As the hazy weather rises and falls across the country, people are thinking more about the effects of haze on health, especially on the respiratory tract, especially the lungs. With the widespread use of chest CT in medical checkups, the diagnosis of “pulmonary nodules, ground glass nodules” often appears in medical reports, and many people have doubts and even anxieties. It has also become a hot topic to find out whether or not pulmonary nodules should be treated and how they should be treated. Here we discuss a few misconceptions about lung nodules. The diagnosis of lung nodules is initially based on imaging, based on high-definition CT scan, the nature of nodules is initially determined from the size, density and proportion of solid components, which can be broadly divided into solid nodules and ground glass nodules, with more research on solid nodules, which can be determined as benign nodules or malignant occupations based on solid components and surrounding burr signs, and ground glass nodules including atypical Adenomatous changes, carcinoma in situ, and invasive or microinvasive adenocarcinoma. The detection of a lung nodule does not necessarily conclude that it is a lung cancer, but requires dynamic observation or surgery and adequate attention. Even if a lung nodule is diagnosed as early stage lung cancer, it cannot be said to be “incurable”, and good results can still be achieved through surgery. 2.Pulmonary nodules can be eliminated by drugs Inflammatory nodules can be eliminated by themselves, but there are no special drugs to eliminate the nodules for the time being, and the propaganda of taking drugs to remove pulmonary nodules claimed by the media or unscrupulous vendors is not highly credible. 3, lung nodules are caused by smoking, smoking cessation can avoid lung nodules The cause of lung nodules is still unclear, smoking, air pollution, oil smoke, formaldehyde may be an important cause of lung nodules generated, but there is no conclusive evidence to confirm. Related studies are still ongoing. So, among the lung nodules detected by chest CT, which lung nodules need surgical treatment Small lung nodules are more common in the normal physical examination population and are also common in people at high risk of lung cancer, but finding small lung nodules does not mean that lung cancer has occurred; small lung nodules themselves contain a collective term for many extremely different kinds of diseases. Surgery needs to be actively considered in the following cases: 1. Nodules that have been clearly diagnosed as lung cancer, such as cancer cells found through lung nodule puncture. 2.Pulmonary nodules found by CT examination of the chest are considered to be lung cancer (see the imaging section of this manual for details). 3.Pulmonary nodules detected by chest CT examination are found to be gradually increasing in size and growing rapidly when the CT is repeated during the follow-up period. In conclusion, once patients find small lung nodules, they do not need to be overly nervous, but they should not be paralyzed either. They should actively seek a clear diagnosis from radiologists, thoracic surgeons and other specialists, and actively choose surgical treatment if necessary. Nowadays, most scholars believe that for small isolated pulmonary nodules whose nature is difficult to be identified, active surgical treatment should be performed. Currently, minimally invasive thoracoscopic surgical treatment is the treatment of choice for patients with pulmonary nodules.