Lung cancer is not contagious and is not transmitted through any means. Lung cancer is a malignant tumor and the cause is not clear, but it is related to the irritation of lung mucosa by smoke and dust or long-term exposure to air pollution and ionizing radiation. In addition, chronic diseases such as tuberculosis, bronchitis and bronchiectasis may increase the risk of cancer. Although lung cancer is not contagious, if an immediate family member has a history of lung cancer, his or her children will be among the high-risk group for lung cancer. It may be related to congenital genes, acquired dietary habits and the same living environment. The probability of developing this type of lung cancer is low, and it is not a bloodline inheritance in the traditional sense, but a potential genetic susceptibility. It is recommended that such high-risk people should go to the hospital for regular checkups and focus on lung cancer prevention. In daily life, we should pay attention to avoid smoking and second-hand smoke and take effective protective measures. If you are in an environment with more smoke and dust, you should wear masks and face masks for protection, minimize the amount of radiation to which the body is exposed, and reduce the exposure to carcinogenic factors. For patients with chronic respiratory diseases, early detection and early treatment are necessary to avoid delaying the disease and leading to the occurrence of lung cancer. In the treatment of lung cancer, most of them require surgical resection, and the scope of resection varies according to the severity. Before treatment, doctors will choose the appropriate treatment modality according to the patient’s specific condition and provide comprehensive treatment after surgery, such as radiotherapy, immunotherapy, targeted therapy, etc.