Frozen shoulder can make everyday movements such as reaching overhead, dressing or sleeping comfortably difficult. If you are considering hydrodilatation for frozen shoulder, the success rate is likely to be one of your first questions, along with how long treatment takes to work and what the procedure involves.
It is understandable to want a clear figure when pain and stiffness have already lasted for weeks or months. Research suggests hydrodilatation may improve pain and mobility for many people, but there is no single percentage that reliably predicts an individual’s outcome.
Who is this guide for?
This guide is for anyone considering hydrodilatation for frozen shoulder who wants a realistic picture of effectiveness, expected results and the likely timeline for improvement. It also explains what ultrasound can show and what to expect from treatment.
What is hydrodilatation for frozen shoulder?
Frozen shoulder, also called adhesive capsulitis, causes pain and progressive restriction of shoulder movement. The joint capsule, the flexible tissue surrounding the shoulder joint, becomes inflamed, thickened and tight.
Hydrodilatation, also known as hydrodistension or distension arthrography, uses a sterile mixture, typically saline, corticosteroid and local anaesthetic, to gently stretch the capsule. The steroid may help reduce inflammation, while local anaesthetic helps with comfort.
We perform the procedure under ultrasound guidance so the needle and target area can be viewed in real time. Before treatment, we assess whether the symptoms and clinical findings are consistent with frozen shoulder and whether hydrodilatation is suitable.
Does frozen shoulder show up on ultrasound?
Frozen shoulder is mainly a clinical diagnosis, based on the pattern of pain and stiffness, your history and examination.
Ultrasound can show features associated with frozen shoulder, including thickening around parts of the joint capsule and rotator interval. It can also assess other common causes of shoulder symptoms, such as rotator cuff tears or significant tendinopathy. Imaging supports the assessment rather than replacing it.
If symptoms suggest a deeper joint or bone problem, an X-ray, MRI or specialist review may be more appropriate.
What is the success rate of hydrodilatation for frozen shoulder?
There is no single hydrodilatation for frozen shoulder success rate that applies to everyone. Studies define “success” differently, using pain, function, range of movement or combinations of these outcomes, and treatment techniques vary.
A 2023 systematic review found temporary improvements in shoulder disability and passive external rotation compared with steroid injection alone. A larger 2026 review was more cautious: it found greater external rotation at 12 weeks, but no clear meaningful advantage in pain, disability, abduction or forward flexion compared with corticosteroid injection alone.
The practical message is that hydrodilatation may help pain and restricted movement, but improvement cannot be guaranteed. We discuss what may be realistic for your symptoms rather than quoting a percentage that may not apply to you.
Can you remove a splinter or glass fragment yourself?
A shallow, clearly visible splinter can often be removed carefully with clean tweezers. Avoid repeated digging if it does not come out easily.
Seek professional assessment if the object is deep, broken below the surface, glass or metal, or linked with increasing pain, redness, swelling, warmth or discharge.
When should you see a clinician for a foot foreign body?
Arrange an assessment if the object cannot be seen or removed cleanly, symptoms are worsening, or you are unsure whether part remains. A clinician can also advise on tetanus protection after a puncture or contaminated wound.
Seek urgent medical advice after a significant injury, or for rapidly increasing redness or swelling, fever, severe pain, marked numbness or weakness, loss of movement, or a cold or discoloured foot.
How is a foreign body in the foot diagnosed?
Assessment usually starts with the injury history and examination. If the object cannot be confirmed by sight or touch, imaging may help.
X-ray can be useful for glass or metal. Foreign body ultrasound is useful for more superficial soft-tissue objects, including wood and materials that may not show on radiographs. Ultrasound scan can detect most foreign bodies. CT may suit deeper objects or uncertain findings; MRI is used selectively and requires caution if metal may be present.
Can ultrasound detect wood, glass and metal in the foot?
Ultrasound can identify many retained soft-tissue foreign bodies, including wood, glass and metal, although visibility varies with size, depth and material. They often appear bright, or echogenic, with shadowing or reverberation behind them.
A high-frequency scan can assess a fragment’s size, depth, position and relationship to nearby tendons or blood vessels. It may also show surrounding inflammation or fluid.
What happens during a foreign body foot scan at RAD Clinics?
We aim to keep the process clear. Our foreign body scan pathway may include:
- Triage: we review the injury history, symptoms and relevant tetanus information.
- Scan: we use high-frequency ultrasound to locate and characterise a suspected fragment.
- Report: we provide a same-day structured report with annotated images.
- Advice: we explain the findings and next steps, including onward referral if removal is required.
We perform the imaging and reporting. We do not extract a confirmed foreign body; foreign body removal is carried out by an appropriate GP or surgical team.
Please note that our fees may change over time, so we always recommend checking the latest price with our team before booking.
What if the object has been in your foot for years?
A foreign object under the skin for years may cause no obvious problem and can become surrounded by scar or inflammatory tissue. Symptoms may appear later as pain, a lump or repeated inflammation.
The same can apply to a retained splinter, old glass or gravel stuck under the skin for years. Ultrasound may help show whether a retained foreign body could be contributing, alongside symptoms and examination.
What are the risks of leaving a foreign body in the foot untreated?
Possible problems include infection, an abscess, irritation of a nearby tendon or nerve, and a granuloma – a lump of inflamed tissue around the object. Weight-bearing may also prolong symptoms.
Not every retained object causes complications, but persistent or worsening symptoms should be assessed.
Key takeaways
- Splinters, glass and metal fragments can be difficult to locate once the skin has closed.
- X-ray is useful for many glass and metal fragments; wood and some other materials may be missed.
- Ultrasound is radiation-free and can help locate and characterise selected superficial foreign bodies.
- A retained object may remain unnoticed for months or years and become symptomatic later.
- We offer same-day foreign body ultrasound scanning and a same-day structured report, with onward referral advice where required. Extraction is performed by an appropriate GP or surgical team.
Common Questions About hydrodilatation for frozen shoulder
How many hydrodilatation sessions are usually needed?
Many pathways start with one procedure and then review progress. Research has not established an ideal number of injections. A repeat procedure may be considered for some people after reassessment.
Can you drive after hydrodilatation?
Driving advice varies between services. Some NHS services advise not driving for 24 hours after hydrodilatation. We recommend checking the advice for your appointment in advance and arranging alternative transport if needed.
Is hydrodilatation better than a steroid injection alone?
Not clearly for every outcome. Some evidence suggests greater improvement in certain movements, but recent research has not shown a consistent meaningful advantage for pain or overall disability. The choice should be based on symptoms, stage and clinical assessment.
Where can I get hydrodilatation for frozen shoulder near me?
If you are searching for hydrodilatation for frozen shoulder near me, look for a service that assesses suitability before treatment and uses imaging guidance. We provide assessment, ultrasound imaging and ultrasound-guided hydrodilatation. Our team can explain the appointment process, the latest fee and appropriate follow-up.
References
- Rhim HC, Shin J, Olson G, et al. Hydrodilatation for adhesive capsulitis: a systematic review exploring efficacy and optimal technique.
- Poku D, Hassan R, Migliorini F, Maffulli N. Efficacy of hydrodilatation in frozen shoulder: a systematic review and meta-analysis.
- Shrestha-Taylor S, Clarke JL, Poulos A, Ginn K. Ultrasound Features for the Diagnosis of Adhesive Capsulitis/Frozen Shoulder: A Systematic Review.
- The Princess Alexandra Hospital NHS Trust. Shoulder Hydrodilatation Patient information leaflet.
