The common causes of shoulder pain and inability to lift the arm are as follows: 1. Fractures and dislocations of the shoulder joint caused by acute violent injury can lead to severe pain in the shoulder joint, while the arm will not lift. In this case, the patient often has a history of violent trauma, local deformity and severe pain, and a hospital examination can clarify the diagnosis. 2. Frozen shoulder, due to a sterile inflammation of the tissues around the shoulder joint, leads to local swelling and pain, resulting in the inability to lift the arm. In this case, it is recommended to go to the hospital for a detailed examination and take the appropriate anti-inflammatory and analgesic treatment, blood circulation and blood stasis treatment, and also local closed injection treatment. At the same time, we should insist on functional exercises for the shoulder joint to preserve its function and range of motion, and after the inflammation dissipates, normal function can be restored.