Back shoulder pain may have the following diseases: 1, myofasciitis, myofasciitis can occur when the pain in the inner back scapula, can radiate to the ipsilateral upper limb, appear numbness, weakness of the upper limb symptoms, at night when sleeping under pressure or cold exertion, the pain is very obvious. In this case, it is necessary to conduct relevant examinations to exclude other diseases for diagnosis. 2. cervical spondylosis, cervical spondylosis can also lead to pain in the neck and shoulder, which can radiate to the back and shoulder. In this case, cervical spine X-ray and MRI should be performed, and relevant investigations should be conducted for diagnosis and treatment. 3, lung disease, when there is a tumor or inflammation in the upper lobe of the lung, the pain in the back and shoulder can also occur reflexively. 4, heart or gallbladder disease, when there is cholecystitis, heart attack or angina pectoris, the pain in the back and shoulder can also occur, in this case, relevant cardiac ultrasound, ECG or gallbladder ultrasound should be performed, This is the time to have the relevant heart ultrasound, electrocardiogram or gallbladder ultrasound, CT examination for diagnosis and treatment.