Back shoulder and arm pain can have the following causes: first, myofasciitis, myofasciitis is often the first symptom of pain in the back right scapula, can radiate to the ipsilateral shoulder and upper limbs, pain, soreness, weakness, especially at night when sleeping under pressure, cold, exertion, pain is very obvious, to early physical examination as well as examination, to exclude other diseases to early diagnosis and Early treatment. Second, cervical spine diseases, when cervical spondylosis is heavy and compresses the nerve roots, there can be pain in the back of the shoulder and radiating pain in the arm, so early physical examination and examination of cervical spine X-ray, CT and MRI are needed for early diagnosis and early treatment.