<unk> , including pain, are  one of the more common reasons for physician visits for musculoskeletal symptoms. The<unk>  is the most movable joint in the body. However, it is an unstable joint because of the range of motion allowed. It is easily subject to injury because the ball of the upper arm is larger than the<unk>  socket that holds it. To remain stable, the<unk>  must be anchored by its muscles, tendons, and ligaments. Some<unk>  arise from the disruption of these soft tissues as a result of injury or from overuse or underuse of the<unk> . Other<unk>  arise from a degenerative process in which tissues break down and no longer function well.<unk>  pain may be localized or may be referred to areas around the<unk>  or down the arm. Disease within the body (such as gallbladder, liver, or heart disease, or disease of the cervical spine of the neck) also may generate pain that travels along nerves to the<unk> . Conversely, pain felt in the region of the<unk>  blade or scapula nearly always has its origin in the neck.
Shoulder problems
Scoliosis causes
Neck stiffness
Back pain
Neck masses causes
Scoliosis risk factors
Low back pain
Infertility causes