Clinically, if you cannot lift your right arm, or if the lifting process is accompanied by varying degrees of pain, you should consider the shoulder joint itself: 1. To exclude whether the shoulder joint has frozen shoulder, also known as fifty shoulder, fifty shoulder is a disease with an unknown pathogenesis of limited movement of the shoulder joint in all directions. It is caused by a wide range of joint capsules and muscles around the shoulder joint. This disease is somewhat self-limiting, and a small number of patients require surgical treatment.2. In addition to periarthritis of the shoulder, a common disease of difficult shoulder lift requires MRI to confirm whether there is an associated rotator cuff injury, especially a chronic injury to the supraspinatus muscle. The supraspinatus muscle passes under the acromion, and in cases of chronic strain and friction, it can lead to a rupture of the supraspinatus muscle, resulting in difficulty in abduction.3. In addition to the causes of the shoulder joint itself, cervical spine problems need to be ruled out. Neurogenic cervical spondylosis manifests as difficulty in lifting the shoulder in addition to varying degrees of radiating pain in the forearm of the upper extremity, and therefore needs to be ruled out by MRI.4. For some patients with a history of trauma, the patient needs to be carefully examined for brachial plexus nerve function and, if necessary, ruled out by electromyography for brachial plexus nerve injury.