Shoulder instability occurs when your shoulder joint (ball and socket) has lost is normal alignment (ball resting symmetrically in the socket), which causes your arm to lose its support. The most ...

Posterior shoulder dislocation occurs when the top of the upper arm bone, known as the humerus, moves backward out of its socket. This causes pain, muscle spasms, and a limited range of motion. The ...

The collarbone, or clavicle, is a long, thin bone between the breastbone or sternum and the shoulder. A collarbone dislocation occurs when the collarbone moves out of its usual position, often due to ...

A dislocation is a joint injury in which the bones are forced out of their usual positions and are completely separated. Your joints are where two or more bones meet. It can be hard to tell if a bone ...

Chicago Bears quarterback Mitchell Trubisky dislocated his left shoulder early in the first quarter in the team's victory over the Minnesota Vikings Sunday. According to ESPN's Adam Schefter, a source ...

The kneecap or patella is a triangular piece of bone that protects the front of the knee joint. It may get dislocated when the leg suddenly changes direction and the foot is planted on the ground, ...