Shoulder muscles with hard lumps mainly consider muscle strain, frozen shoulder, rotator cuff injury, thoracic outlet syndrome and cervical spondylosis and other aspects of the cause. 1. Muscle strain: muscle strain can lead to muscle spasm, due to frequent muscle contraction, resulting in obvious muscle strain, and the emergence of persistent paroxysmal muscle spasm, manifested as stiffness, tautness is more obvious. Can be symptomatic use of hot packs, physiotherapy treatment. 2. Frozen shoulder, mostly seen in patients around 50 years old, manifested as shoulder pain, soreness, shoulder stiffness, shoulder with hard lumps, obvious shoulder joint activity disorder. You can take oral celecoxib and other non-steroidal anti-inflammatory drugs and prednisolone and other drugs to continue closed treatment. 3. Rotator cuff injury, mainly due to trauma, chronic wear and tear caused by partial or complete rupture of the ligament, in the pain and activity limitation at the same time, accompanied by shoulder stiffness and shoulder hard lump. Minimally invasive arthroscopy can be used to repair and shape the rotator cuff injury. 4. Thoracic outlet syndrome, caused by nerve compression, muscle spasm in the innervated area of the scapula, resulting in stiffness, tautness and limitation of movement, and shoulder stiffness can occur. Surgical release is the main treatment. 5. Cervical spondylosis, nerve root cervical spondylosis, when the nerve is squeezed, the innervated area of the soreness, muscle spasm, stiffness and other conditions appear, there is a hard lump in the shoulder. Treatment can be oral non-steroidal drugs such as Loxoprofen sodium. The condition lumbar spine is treated with surgical decompression and excision. Appearance of shoulder with hard lumps if a long time does not relieve, need to promptly go to the regular hospital to find the cause of the cause of the cause of treatment.