Lung cancer patients can also cause symptoms of shoulder pain. Lung cancer belongs to malignant tumor of lung tissue. Therefore, with the development of lung cancer, especially if the disease is not treated and controlled in time, distant metastasis will gradually appear, including metastasis to various organs and tissues, thus causing corresponding clinical symptoms, such as metastasis to the pleura, causing chest and back pain, and implicated in causing shoulder pain. Lung cancer can also cause bone metastasis, such as metastasis to the scapula, which can cause shoulder pain. In addition, lung cancer can compress nerves, such as compression of brachial plexus nerve, which can also cause shoulder pain. Therefore, the specific cause of shoulder pain caused by lung cancer should be clarified and pain relief drugs should be used at the same time, such as morphine, tramadol, oxycodone, etc.