Shoulder pain and upper back muscle soreness may be caused by fasciitis of the neck and back muscles, cervical spondylosis and frozen shoulder. 1. Fasciitis of the cervical back muscle: due to trauma or cold stimulation of the cervical back muscle area, leading to the occurrence of fasciitis, due to the stimulation of inflammation, it will lead to the contraction of the muscles and blood vessels of the back of the shoulder, blood supply is reduced, which leads to the symptoms of shoulder pain in the upper back muscle soreness and swelling. 2. Cervical spondylosis: because the cervical spondylosis itself physiological curvature straightening or muscle ankylosis, will cause inflammation material exudation, coupled with the cervical spondylosis osteophytes will stimulate the muscles and the surrounding nerves, resulting in muscle adhesion, thus causing shoulder pain on the back of the muscle soreness and swelling of the symptoms. 3. Frozen shoulder: Frozen shoulder triggers shoulder pain and upper back muscle soreness, may be directly related to chronic injury to muscle ligaments, there may be chronic inflammation stimulation, which causes shoulder pain and upper back muscle soreness symptoms. If the patient’s shoulder pain upper back muscle soreness, it is recommended to go to the hospital in a timely manner, to identify the cause of the targeted treatment.