Shoulder subluxation or shoulder instability occurs when the shoulder partially dislocates. By its nature, the shoulder joint allows a large range of movement which means it is likely to be less stable than other joints, such as the hip. There are several reasons why the shoulder joint may be unstable and dislocate which are described below. Medical help from a physiotherapist will help as they can give exercises to help strengthen and stabilize the area.
The glenoid labrum is a fibrous ring of tissue which attaches to the rim of the glenoid shallow hole or socket of the shoulder blade where the ball of the humerus or arm bone sits. When this tissue tears, it creates general shoulder pain and weakness in the joint. This shoulder injury is often caused by repetitive movement such as overhead throwing, so resting from these activities will help to ease the pain