Frozen shoulder (adhesive capsulitis) is an inflammatory condition of the shoulder joint, resulting in pain, stiffness and thickening of the joint capsule. Its cause is unknown, and symptoms can sometimes last up to 2 years. Therefore it is important to identify and treat early, in order to retain as much function as possible and encourage faster recovery. What causes the shoulder to ‘freeze’? The specific cause of frozen shoulder remains unknown, however there are thought to