The appearance of shoulder muscle soreness. First, the shoulder area of the muscle excessive pulling, caused by stress, it will lead to shoulder area of the muscle spasm, strain, it will cause the shoulder area of the muscle excessive contraction, relaxation is weakened, thus causing the muscle has obvious soreness. Second, patients with frozen shoulder, frozen shoulder is mainly around the shoulder joint ligament joint capsule adhesion, contracture situation, and the shoulder area of the muscle tissue is mainly in the shoulder joint area, will also be subjected to frozen shoulder inflammatory adhesion, so it will cause shoulder muscle soreness. Third, the nerve root type cervical spondylosis, the early stage is also easy to lead to the neck, shoulder and back muscle soreness and pain.