Shoulder pain is common due to trapezius muscle spasm, cervical spondylosis and other causes, as follows: First, trapezius muscle spasm: fallen pillow will make trapezius muscle spasm tension, the patient will have severe neck pain and shoulder pain symptoms, accompanied by cervical spine activity restriction, shoulder joint activity restriction, and in severe cases, there will be relative fixation of the scapula, and when pressed, the symptoms are obvious, and there can be spastic hard knots in the muscle; Second, cervical spondylosis. Patients with cervical spondylosis will aggravate the cervical spine disease, the patient will have severe edema of the nerve, and accompanied by severe pain in the neck and shoulder joint as well as restricted movement, through cervical MRI can find cervical disc herniation, cervical spinal stenosis and intervertebral foraminal stenosis, and can find the degree of nerve compression. Early diagnosis and treatment of shoulder pain in patients with drop pillow can bring symptoms under control.