In today’s world of cancer, cancer is the most taboo, especially lung cancer, because lung cancer is the most prevalent malignant tumor and the first cause of death. Lung cancer is the most common primary malignant tumor of the lung, which is mainly divided into small cell lung cancer and non-small cell lung cancer. Its main symptoms are coughing, coughing sputum, blood in sputum, low fever, chest pain, and tightness of breath. Once detected, it is usually in the middle and late stage, which is extremely unfavorable for treatment. Then not only some people ask, what is the development process of lung cancer? We can understand that this lung cancer has a distinctive feature that in the early stage, there are no obvious symptoms, and once symptoms appear, it usually has already entered the middle or late stage, and when it is found, there may not even be a way to do surgery. When there are no symptoms, it is possible to be in the early stage of lung cancer. If it can be detected at this time, then because the lesion is small, the possibility of radical resection is greater and the prognosis is good. However, it should be clear that very few lung cancer patients can be detected at early stage for the simple reason that early lung cancer has no obvious symptoms or the symptoms are not typical enough to determine that it is caused by lung cancer. Therefore, all of us, regardless of whether we are in discomfort or not, need to do regular medical checkups, so that if lung cancer lesions can appear early, it will be beneficial for treatment. However, it should also be clear that this is only a symptom of most lung cancer patients. There are some patients who have lung cancer for a long time, but the lesions may still be limited to the early stage of the lung, which is still early stage lung cancer. This situation is related to the biological characteristics of the tumor itself and its rate of development. Generally speaking, for lung cancer, the earlier the diagnosis is made, the better the chance of cure. If the tumor has developed to the middle or late stage, although it is not difficult to diagnose and there are treatment methods, the efficacy is not satisfactory. It is impossible to achieve satisfactory treatment effect.