The causes of right shoulder joint pain include frozen shoulder, nerve root cervical spondylosis and soft tissue injury. 1. Frozen shoulder: a chronic inflammatory disease caused by various reasons leading to injury of the shoulder joint capsule and its surrounding ligaments, tendons and bursa. Its main manifestations are pain in the shoulder joint, restricted movement and other symptoms. 2. Neurogenic cervical spondylosis: It is a kind of cervical spondylosis, mostly caused by the compression of cervical nerve roots by the protruding cervical intervertebral discs or hyperplastic ligaments. It mainly manifests as neck and shoulder pain, like discharge, radiating to the upper limbs or hands, which may be accompanied by numbness of neck and shoulders, upper limbs, stiffness of neck muscles and other symptoms, and may also cause right shoulder joint pain. 3. Soft tissue injury: such as excessive exercise, trauma and other causes of soft tissue injury around the shoulder joint, can also cause right shoulder joint pain, usually accompanied by localized swelling and so on. There are many other causes of right shoulder pain, it is recommended to consult a doctor in time to find out the cause of the disease and follow the doctor’s instructions for further treatment or therapy.