Lung cancer will cause chest pain as well as metastatic site pain. 1. Chest pain: lung cancer will cause pain when it presses peripheral nerves, and when the tumor invades pleura or chest wall, it will also cause pain in the affected area, which will be aggravated by deep breathing. 2. Metastatic site pain: for example, liver metastasis will cause right upper abdominal pain, often accompanied by jaundice and loss of appetite. Bone metastasis will cause bone pain at the metastatic site, and adrenal metastasis will cause pain at the adrenal gland. Gastrointestinal metastasis may cause abdominal pain, black stool and other symptoms. The location of pain is different for different parts of the metastasis. To confirm the diagnosis of lung cancer, it is necessary to do chest X-ray, tumor markers and other tests, and pathology biopsy if necessary. Patients with pain should consult the doctor in time to get a clear diagnosis so as to avoid delaying the condition.