There is no shoulder pillow, the pillow is mainly for the cervical spine area, only in the clinical have more serious pillow, cervical pain, limited range of motion, there is muscle pull, sometimes can cause shoulder pain. But the appearance of this pain is mainly and shoulder strain during the day, strain too much, such as long hours of ambulatory work, sitting and driving a fixed posture for too long, resulting in too much tension and strain on the muscles around the shoulder. And at night a fixed posture time to sleep, and the wind, cold, in addition to causing the case of the pillow, but also caused shoulder pain, at this time is equivalent to myofasciitis around the shoulder, muscle strain. In addition, if you are older, it is possible that cervical spondylosis or frozen shoulder is induced by two diseases together. If the pain is prolonged or if the symptoms are obvious and you do not get significant relief by resting on your own, you should go to the orthopedic department of the hospital for an examination.