Pain in the right anterior chest, posterior back, and shoulder joints at the same time may be caused by cervical spondylosis. Cervical spondylosis refers to a disease in which the cervical disc cartilage, cervical vertebral body or cervical intervertebral joints develop degenerative lesions and osteophytes occur. Osteophytes can irritate the cervical nerves, cervical arteries, and even the spinal cord in the cervical vertebrae. The cervical nerves are distributed in the anterior thoracic, posterior back and shoulder joints, and suffering from cervical spondylosis can result in simultaneous pain. The distribution area of the cervical nerves is in the upper third of the anterior thorax and the posterior back, and if the pain is located downward, it is not related to cervical spondylosis. It is also possible that the pain is caused by periarthritis. Periarthritis is caused by damage to the degenerated soft tissues and inflammation and adhesions occur. If the periarthritis is severe, there will be radiating pain in the shoulder joint and the pain may then radiate to the front chest or even the back.