The part of the body we call the shoulder consists of several joints that work with tendons and muscles to allow the arm to move in many directions. We can bowl a perfect game or reach the top shelf thanks to this system of joints, muscles and tendons. However, it is possible to overextend the shoulder and end up with pain. When your shoulder is painful, everyday life activities become difficult.
Shoulder pain can be caused by several different actions, according to the American Academy of Orthopaedic Surgeons. Repetitive motions like painting a wall or swimming a long distance can result in bursitis. Bursae are the small, fluid-filled sacs that serve as a cushion between bones and the soft tissues to reduce friction.
Source: Chicago Tribune