Shoulder problems including pain, are one of the more common reasons for physician visits for musculoskeletal symptoms.
The shoulder is a ball-and-socket joint that has three main bones, cushioned by a layer of cartilage. It’s the most movable joint in the body, moving the shoulder forward and back and in a circular motion. However, that wide range of motion makes it is an unstable joint with an increased chance of injury that can lead to a degenerative process in which tissues break down and no longer function well.
Shoulder pain may be localized or may be referred to areas around the shoulder or down the arm. Other regions within the body (such as gallbladder, liver, or heart disease, or disease of the cervical spine of the neck) also may generate pain that the brain may interpret as arising from the shoulder.