Frozen shoulder (adhesive capsulitis)
The capsule inflames, thickens and contracts, passing through painful, stiff and thawing phases over one to three years. Ultrasound-guided intra-articular steroid injection shortens the painful phase; hydrodilatation (stretching the capsule with fluid) and a suprascapular nerve block help stiffness and allow physiotherapy to progress. Manipulation under anaesthesia or arthroscopic release is reserved for the few who do not improve.