What Is Frozen Shoulder? Frozen shoulder (adhesive capsulitis) is a condition causing stiffness, pain, and limited range of motion in the shoulder joint. It develops gradually, worsens over time, and can take 1–3 years to resolve without treatment. Physiotherapy is the primary treatment recommended by the NHS and can significantly shorten recovery time. The Three Stages of Frozen Shoulder Freezing stage (2–9 months) — pain gradually increases and range of motion starts to reduce. Night pain is common. Frozen stage (4–12 months) — pain may decrease, but the shoulder becomes very stiff. Daily activities like dressing and reaching become difficult. Thawing stage (5–24 months) — range of motion gradually improves. Physiotherapy during this phase can accelerate recovery. Who Gets Frozen Shoulde