- Type
- Keyhole (arthroscopic)
- Anaesthesia
- General + interscalene block
- Day surgery
- Yes
- Sling
- Optional, 1 week
- Physiotherapy
- Starts day 1
- Outcome timeline
- 3–6 months
When the operation is indicated.
Most frozen shoulders do not need surgery — they are self-limiting over 18–24 months on average, and well-placed corticosteroid injection or hydrodilatation is sufficient for symptom control in the painful phase. Arthroscopic capsular release is reserved for the minority of patients in whom stiffness is severe and persistent despite 6–9 months of well-conducted non-operative treatment. It is also useful for post-operative stiffness (after rotator cuff repair, instability surgery or fracture fixation) and for diabetic frozen shoulder which is often more resistant to injection.
How it is performed.
Under general anaesthesia with a regional block, an arthroscope is introduced through standard posterior and anterior portals. The contracted shoulder capsule is divided under direct vision: anteriorly through the rotator interval (the most consistently contracted area), and (where indicated) inferiorly and posteriorly. A radiofrequency probe or fine arthroscopic scissors are used to make the release cleanly and minimise bleeding. After release, the shoulder is moved gently through a full passive range — by surgery's end the motion should match the non-operated side.
The operation takes approximately 30–45 minutes.
Recovery timeline.
Day 0–1
- Day surgery. Regional block for 12–18 hours of pain relief.
- Active and active-assisted exercises start on day 1.
Week 1–6
- Physiotherapy 2–3 times per week — the rehabilitation matters as much as the surgery.
- Return to driving is criteria-led: off opioid medication and able to perform an emergency stop comfortably.
- Return to a desk job within a week.
Month 2–6
- Strengthening commences.
- Most daily activities resumed.
- Most patients reach a satisfactory functional outcome between 3 and 6 months.
Rehab protocol
A written, procedure-specific rehabilitation protocol is provided to your physiotherapist on the day of surgery. View the recovery roadmap for the full five-phase journey, or visit For Physiotherapists to request protocols directly.
Risks and complications.
Capsular release is keyhole surgery, but it still carries risks. The main ones are:
- Return of stiffness: some movement can be lost again, particularly in people with diabetes.
- Pain: in the weeks after surgery while movement is regained.
- Nerve injury: rare, including injury to the axillary nerve.
- Fracture or tendon injury: rare, and mainly when manipulation is combined with release.
- Infection: uncommon.
- Anaesthetic and medical complications: assessed and minimised through the pre-admission process.
This is not a complete list. Dr Coory discusses the risks that apply to you, and how they are reduced, before you consent to surgery. Any surgical or invasive procedure carries risks. Before proceeding, you should seek a second opinion from an appropriately qualified health practitioner.
Frequently asked questions.
Will my stiffness come back after release?
Recurrence is uncommon in well-selected idiopathic frozen shoulder. Patients with diabetes have a slightly higher recurrence rate. Diligent physiotherapy in the early weeks is the strongest protective factor.
How quickly will I get my range of motion back?
Range of motion is restored on the operating table. The challenge is keeping it — which is why physiotherapy begins on day 1 and is intensive in the first 4 weeks.
Is the operation painful?
Less than patients expect. The regional block covers the first 12–18 hours. Pain decreases steadily after that, in contrast to the relentless pain of the frozen shoulder itself.
Will I be in a sling?
No formal sling is required. A comfort sling for 24–48 hours is reasonable; longer sling immobilisation defeats the purpose of the operation.
When can I drive?
Return to driving is criteria-led: when you are off opioid medication and can perform an emergency stop comfortably.
References.
- Pearsall AW, et al. Arthroscopic capsular release for refractory shoulder stiffness. Arthroscopy. 1999;15(8):780–785.
- Snow M, et al. The use of capsular release for refractory frozen shoulder. J Shoulder Elbow Surg. 2008;17(1):16–21.
- Rangan A, et al. UK Frozen Shoulder Trial (UK FROST). Lancet. 2020;396(10256):977–989.