The common causes of neck and shoulder joint pain include neck and shoulder muscle strain, cervical spondylosis, frozen shoulder, and falling pillow. 1. Neck and shoulder muscle strain: muscle ligament strain and contusion in the neck and shoulder area will lead to neck and shoulder joint pain. 2. Cervical spondylosis: degenerative cervical spine lesions may compress local nerves, muscles, soft tissues and blood vessels, which may also lead to the symptoms. 3. Frozen shoulder: refers to the shoulder joint and the surrounding soft tissues, degenerative changes caused by chronic injury, can also lead to neck and shoulder joint pain. 4. Falling pillow: sleeping in an improper posture or pillow too high and so on caused by falling pillow, can also lead to neck and shoulder joint pain. There may be other reasons for neck and shoulder joint pain, and you need to go to the hospital in time for examination to clarify the cause.