Frozen shoulder or adhesive capsulitis, can develop as an isolated event or following an injury such as a fracture, dislocation or other trauma, where there may be reduced shoulder motion over a period of time.
Shoulder movement is dependent on the correct alignment of the surrounding supporting joint lining (or capsule). In adhesive capsulitis, the shoulder joint lining becomes inflamed causing scar tissue to form. This in turn severely reduces (or freezes) the shoulder's range of movement and is often associated with significant joint pain. Restricted movement of the shoulder accompanied by persistent pain contributes to the frozen status of the joint.