There are several possible causes of shoulder pain: first, myofasciitis, myofasciitis can often lead to pain in the medial scapula, which can radiate to the ipsilateral shoulder and upper limbs, with symptoms of soreness, pain, and weakness, which should be diagnosed by early physical examination and examination to exclude other diseases; second, scapular disease, when there is a tumor or metastasis in the scapula, there can be shoulder pain. Third, shoulder lock arthritis, when the shoulder lock joint has chronic inflammation, the pain of the bone can also appear, then the relevant examination, X-ray and CT examination should be conducted to diagnose.