Chest tightness and back pain are not necessarily lung cancer, or there is no necessary relationship between chest tightness and back pain and lung cancer. Chest tightness and back pain are relatively common clinical symptoms, which can be seen in respiratory diseases and cardiovascular diseases, such as coronary heart disease, myocardial infarction, aortic coarctation, all of which can cause symptoms of chest tightness and back pain. Pneumonia, especially severe pneumonia, can also cause chest tightness and back pain. Of course, lung cancer is a malignant tumor of lung tissue, which can also cause chest tightness and back pain, because lung cancer can block bronchial tubes, causing dyspnea and chest tightness, and it can also cause pleural metastasis, leading to back pain and chest pain, but it cannot be said that chest tightness and back pain are the manifestations of lung cancer. Therefore, if chest tightness and back pain are suspected to be lung cancer, CT or bronchoscopy of lungs can be done in time to make it clear.