Frozen Shoulder Embolization: Am I a Candidate?

If your shoulder has been painful and stiff for months, and the usual treatments have not helped enough, you may have read about shoulder embolization. It is a newer, image-guided procedure that targets the small, abnormal blood vessels that grow around an inflamed shoulder capsule. It is not right for everyone. This guide walks through who tends to be a good fit, who is not, and what has to be ruled out first.

What shoulder embolization is trying to treat

Frozen shoulder (adhesive capsulitis) is an inflammatory condition of the joint capsule. In the first published case series from Japan in 2014, every one of the 7 patients had abnormal new blood vessels near the front of the shoulder capsule, in an area called the rotator interval. Researchers believe these vessels, and the nerve fibers that grow alongside them, feed inflammation and pain.

Embolization uses a thin catheter, usually placed in an artery at the wrist, to deliver tiny particles or a temporary embolic agent into those vessels and reduce the extra blood flow. A small 2023 study of 15 patients used PET scans and found that inflammation in the shoulder dropped after embolization, and that the drop tracked with pain relief. You can read more about the procedure itself on our shoulder embolization page.

Signs you may be a candidate

Published studies have enrolled patients who look roughly like this:

• A diagnosis of frozen shoulder (or, in some studies, painful rotator cuff tendinopathy) confirmed by examination and imaging.
• Pain that has lasted at least several months. Many studies required at least 3 months of symptoms. In one 2024 Spanish study of 20 patients, people had symptoms for a median of about 39 weeks before treatment.
• Conservative care already tried. Most studies required a trial of pain medicine, physical therapy, or injections first. The US investigational study required at least 30 days of conservative treatment; the Spanish study required at least 6 weeks of analgesics and physical therapy.
• Moderate to severe pain, often worst at night. Night pain was the main target in a 2022 Japanese trial of 100 patients.
• Pain that is limiting daily life, such as sleep, dressing, reaching, or work. In the Spanish study, 75% of patients were off work when they were treated.

Shoulder embolization is usually discussed as an option between conservative care and surgery. It is not a first-line treatment. If your frozen shoulder started recently, a steroid injection plus a home exercise program is the treatment with the strongest evidence, and many people improve with that alone. Our comparison of embolization and cortisone injections explains how the two fit together.

Who should not have shoulder embolization

Registered clinical trials list who they exclude, and those lists are a useful guide. Embolization is generally not appropriate, or needs extra caution, if you have:

• An active infection in or around the shoulder, or an infected (septic) joint
• A known complete, full-thickness rotator cuff tear, which is a structural problem that embolization does not repair
• Prior shoulder replacement surgery
• Rheumatoid arthritis or another inflammatory arthritis as the cause of the pain
• Significant artery disease in the arm, or known advanced atherosclerosis that would make the catheter route unsafe
• A severe (anaphylactic) allergy to iodinated contrast dye
• Reduced kidney function, since the procedure uses contrast dye
• A bleeding disorder that cannot be corrected
• Pregnancy

Shoulder pain can also come from the neck, from arthritis of the shoulder joint, or from a fracture. Part of the evaluation is making sure the pain is really coming from an inflamed capsule or tendon and not from something embolization cannot help.

This article is part of our Embolization Guide.

Conditions that need a closer look

Diabetes

Frozen shoulder is much more common in people with diabetes. A 2016 meta-analysis found people with diabetes were about 5 times more likely to develop it. Diabetes is not an automatic reason to rule out embolization, but results may be less complete. In the 2024 Spanish study, the 6 patients with diabetes still needed pain medication at longer-term follow-up.

Stiffness more than pain

Embolization appears to work mainly by calming inflammation and pain. Range of motion improved in most studies, but if your main problem is a shoulder that is mechanically locked with little pain, a stretching-based approach or a procedure that releases the capsule may make more sense. A 2026 cost-effectiveness analysis reached a similar conclusion: embolization may suit pain-predominant frozen shoulder, while manipulation or surgical release may be preferred when stiffness is the main target.

Where you are in the course of the condition

The American Academy of Orthopaedic Surgeons describes frozen shoulder as moving through a painful freezing stage, a stiff frozen stage, and a slow thawing stage, with recovery that may take up to 3 years. Studies of embolization have mostly treated people who were still in significant pain after months of care. If your shoulder is already loosening and the pain is fading on its own, the case for any procedure is weaker.

Stiffness after surgery or injury

A 2021 study treated 25 patients whose stiff shoulder followed surgery or trauma, with pain and motion improving at 6 months. This group has been studied less than primary frozen shoulder.

What the evaluation usually involves

Deciding whether you are a candidate typically includes:

1. A history of your symptoms, prior treatments, and how the shoulder affects sleep and work
2. A physical exam that measures both active and passive range of motion
3. Review of imaging. X-rays help rule out arthritis or fracture. MRI can show capsule inflammation and rotator cuff tears, and several studies used MRI before treatment
4. A check of kidney function, bleeding risk, allergies, and the pulse at your wrist if a wrist approach is planned
5. An honest talk about the evidence, the alternatives, and cost

Our shoulder embolization consultation guide lists the questions worth bringing to that visit.

How strong is the evidence for people like you?

You deserve a straight answer here. Shoulder embolization has promising but early evidence. A 2026 meta-analysis pooled 12 studies with 329 shoulders and found large average improvements in pain, motion, and function, with no severe complications reported. Every one of those studies was single-arm, meaning there was no comparison group, and the authors called for randomized trials. As of October 2026, no randomized sham-controlled trial of shoulder embolization has been published, although several randomized trials are now recruiting. Knee embolization (GAE) has more evidence, including sham-controlled trials. The embolization guide explains how the joints compare.

When to see a doctor urgently

Frozen shoulder is painful, but it is not an emergency. Seek urgent care instead of waiting for a consultation if you have:

• Shoulder or arm pain with chest pressure, shortness of breath, sweating, or jaw pain, which can be a heart problem
• A hot, red, swollen shoulder with fever
• Sudden weakness, numbness, or loss of the ability to lift the arm after a fall or injury
• A cold, pale, or numb hand

Frequently Asked Questions

Do I have to try physical therapy before shoulder embolization?

In nearly all published studies, yes. Patients had already tried medication, physical therapy, or injections, usually for at least several weeks to months, before embolization was considered.

Can I have shoulder embolization if I have diabetes?

Diabetes does not automatically rule it out, and frozen shoulder is common in people with diabetes. One small study found patients with diabetes had less complete long-term relief, so expectations should be discussed openly.

Does a rotator cuff tear rule me out?

A known complete, full-thickness tear is an exclusion in several trials because embolization does not repair torn tissue. Partial tears and tendinopathy are a separate discussion, and one large study included patients with symptomatic rotator cuff tears.

Is there an age limit?

Published studies mostly treated adults in their 40s to 60s, which is when frozen shoulder is most common. Eligibility depends more on your diagnosis, artery health, kidney function, and prior treatment than on age alone.

Keep Reading

• Shoulder Embolization in Manhattan
• How Long Does Shoulder Embolization Last?
• Is Shoulder Embolization Covered by Insurance?
• Is Shoulder Embolization Painful? What to Expect Before, During, and After
• Your Shoulder Embolization Consultation Guide
• Shoulder Embolization Recovery Timeline: Week by Week
• Embolization Guide: knee, heel, shoulder, elbow and hip

Sources

1. Okuno et al., J Shoulder Elbow Surg, 2014 — pilot study of arterial embolization for adhesive capsulitis (7 patients)
2. Shintaku et al., J Shoulder Elbow Surg, 2023 — FDG-PET inflammation changes after embolization in frozen shoulder (15 patients)
3. Lanciego et al., J Vasc Interv Radiol, 2024 — midterm outcomes of embolization for adhesive capsulitis (20 patients)
4. Bagla et al., J Vasc Interv Radiol, 2022 — US investigational device study of adhesive capsulitis embolization (20 patients)
5. Okuno et al., J Vasc Interv Radiol, 2022 — multicenter feasibility trial for refractory nighttime shoulder pain (100 patients)
6. Challoumas et al., JAMA Netw Open, 2020 — comparison of treatments for frozen shoulder: systematic review and meta-analysis
7. ClinicalTrials.gov NCT03676829 — embolization for pain from adhesive capsulitis (eligibility criteria)
8. ClinicalTrials.gov NCT06095050 — embolization vs physical therapy for chronic shoulder tendinopathy (recruiting)
9. ClinicalTrials.gov NCT07336849 — embolization vs usual care for chronic shoulder pain (recruiting)
10. Zreik et al., Muscles Ligaments Tendons J, 2016 — adhesive capsulitis and diabetes: a meta-analysis of prevalence
11. Khabaz et al., Cardiovasc Intervent Radiol, 2026 — cost-effectiveness of embolization vs MUA vs capsular release
12. Fernández-Martínez et al., J Vasc Interv Radiol, 2021 — embolization for secondary stiff shoulder (25 patients)
13. Allaw et al., J Vasc Interv Radiol, 2026 — systematic review and meta-analysis of embolization for adhesive capsulitis (12 studies, 329 shoulders)
14. American Academy of Orthopaedic Surgeons, OrthoInfo — Frozen Shoulder

Medically reviewed by David Fox, MD, FACS, RPVI. This article is general information, not a substitute for a medical evaluation.

Living with joint or tendon pain that hasn’t improved? Schedule a consultation with Dr. David Fox at Fox Vein & Vascular in Manhattan to find out whether embolization is right for you. Call (212) 362-3470 or request an appointment online.