Lung is an organ prone to cancer metastasis, especially in patients with mid to late stage lung cancer and after surgery and chemotherapy, there are many metastases, which is a common disease in clinical practice. According to my clinical observation for many years, when lung cancer metastases, the following symptoms may occur: 1. 2.If there is puffiness and redness in the forehead, face and neck, and there is also dyspnea, it may invade the superior vena cava, which is clinically called “superior vena cava syndrome”, so the condition is critical and should be treated urgently. 3.If there is dyspnea, it may be pleural effusion and invasion of the pleura, at this time, we should promptly take a film for examination. 4. Pain in the upper limbs, unfavorable movement, inability to open the eyes, drooping eyelids, narrow pupils, inwardly sunken eyes, and no sweating on the face may be due to the invasion of the nerves in the same area. 5. Headache, nausea, dizziness, difficulty seeing, and unstable walking may be due to brain metastasis. 6. Fixed pain in the bones of the lumbar and thoracic spine may be bone metastasis. 7. Pain in the liver area may be liver metastasis. 8.Soybean-sized nodules on the skin of the front chest, back and limbs may be subcutaneous metastases, which are generally not a big problem. 9.Lymph nodes in mediastinum and other parts of the body may be enlarged. In addition to the above mentioned parts, I have also seen lung cancer metastasize to pericardium, stomach, kidney, intestine, pancreas, thyroid, adrenal gland, spleen, esophagus, ovary, uterus and other parts of the body, and show corresponding symptoms. In order to prevent lung cancer metastasis early, we should carry out Chinese medicine treatment after surgery and chemotherapy, and conduct regular check-ups, never think that we can rest easy and everything is fine after surgery and chemotherapy.