The common causes of arm lifting are frozen shoulder, rotator cuff injury and cervical spondylosis. 1. Frozen shoulder: Frozen shoulder is caused by the inflammatory reaction of the muscles, ligaments, joint capsule and other structures around the shoulder joint, and even localized adhesion, which will lead to the restriction of the shoulder joint’s activities and pain when lifting. Mild frozen shoulder can be gradually improved through massage and exercise, while more serious cases may need necessary treatment. 2. Rotator cuff injury: rotator cuff injury is mainly caused by chronic strain or trauma to the shoulder joint, resulting in injury to the ligaments and tendons of the shoulder joint. In addition to pain, rotator cuff injuries also cause weakness of the arm. The treatment mainly includes conservative treatment, shoulder joint support fixation or arthroscopic rotator cuff repair surgery and other treatments. 3. Cervical spondylosis: Some cervical spondylosis will compress the nerve root in the neck and radiate to the shoulder or arm, which will also cause pain when lifting the arm, so you should go to the regular hospital for consultation and treatment after clarifying the cause of the disease. If the phenomenon of not being able to lift the arm and having pain when lifting it occurs, it is recommended to go to a regular hospital for consultation. In daily life to properly protect the shoulder joint, and moderate joint activity exercise.