The pain in the right shoulder and the inability to lift the arm are considered to be related to frozen shoulder, rotator cuff injury, cervical spondylosis and so on. 1. Frozen shoulder: commonly found in middle-aged and old people around 50 years old, degenerative changes in the shoulder joint can lead to obvious pain in the shoulder joint, accompanied by limited shoulder joint activities, thus causing the arm can not be lifted. 2. Rotator cuff injury: rotator cuff injury can occur when the shoulder is traumatized, which is manifested as pain in the shoulder, and when rotator cuff injury is serious, the shoulder will have lifting pain, resulting in the arm not being able to be lifted completely. 3. Cervical spondylosis: If you suffer from cervical spondylosis, the cervical intervertebral discs can compress the nerve roots on the right side, causing pain in the right shoulder, and also causing weakness in the right arm that can not be lifted. Right shoulder pain arm lift may also be related to other reasons, it is recommended to consult a doctor in a timely manner to clarify the cause of the pain, and under the guidance of the doctor to carry out formal treatment.