Frozen Shoulder and Diabetes: What It Changes

How much does diabetes raise the risk of frozen shoulder?

Enough that it is one of the first things a physio asks about. Zreik and colleagues pooled the available studies and found people with diabetes 5 times more likely than controls to have a frozen shoulder, with a 95 percent confidence interval of 3.2 to 7.7. Their estimate for the overall prevalence of frozen shoulder among people with diabetes was 13.4 percent (95 percent confidence interval 10.2 to 17.2).

A later and more cautious analysis reached the same direction with a smaller number. Dyer and colleagues pooled six case-control studies, 5,388 people in all, and put the odds of a frozen shoulder in someone with diabetes at 3.69 times the odds in someone without it, with a confidence interval of 2.99 to 4.56. Two cohort studies gave hazard ratios of 1.32 and 1.67. Seven of their eight studies were at high risk of bias, and the authors named unmeasured confounding as their main limitation and asked for better studies to pin down the strength of the link (Dyer and colleagues, 2023).

So the honest version is that the association is real and well replicated, the size of it is less certain, and nobody has shown how diabetes does it. OrthoInfo says plainly that the reason for the link is not known. The JOSPT clinical practice guideline lists diabetes alongside thyroid disease and having had frozen shoulder in the other shoulder as the established risk factors (Kelley and colleagues, 2013).

Does diabetes make frozen shoulder worse?

It tends to make it stiffer and slower rather than more painful. OrthoInfo is blunt about it: when someone with diabetes gets a frozen shoulder, the shoulder is usually tighter than average and the tight spell runs on for longer before any thaw sets in.

That matters for how you judge yourself. If you are working from the usual timeline, a shoulder that is still tight at 18 months can feel like a failure, when for you it may be an ordinary pace. How long frozen shoulder lasts sets out the general figures, and it is worth reading knowing that yours may sit at the long end.

The practical response is not to push harder. Stretching beyond painful limits may lead to poorer results whoever you are (Kelley and colleagues, 2013), and that does not change because the calendar is longer. Little and often, over months, is still the approach. Frozen shoulder exercises by stage has the dose.

What changes about treatment if you have diabetes?

The exercises do not change. The injection conversation does.

A steroid injection into the joint is one of the better-supported treatments for the painful phase, and it is also the treatment with a diabetes-specific catch. Choudhry and colleagues reviewed the studies that measured blood glucose after steroid injections into a joint in people with diabetes and found that levels can go up for several days afterward, with advice to monitor for up to a week (Choudhry and colleagues, 2016).

None of that rules it out. It means the doctor needs to know, you need a plan for watching your readings, and you need to know who to call if they climb further than expected. Injections and other treatments explains what the injection is for and what the evidence says it does.

Does better blood sugar control help the shoulder?

OrthoInfo thinks it can. Its frozen shoulder page tells patients that a raised hemoglobin A1C is worth tackling with whoever looks after the diabetes, a family doctor or an endocrinologist: changing the medication and getting glucose back under control can bring the shoulder round faster.

That is patient guidance from the American Academy of Orthopaedic Surgeons rather than the result of a trial, so treat it as a sensible thing to do that has not been proven to shorten a frozen shoulder. It also costs you nothing you were not already trying to do. Raise the shoulder at your next diabetes appointment, because the two problems are being looked after by different people who may not know about each other.

If reduced feeling in your hands or feet is part of your picture, mention that to your physio as well. It changes how some exercises are set up, and the peripheral neuropathy program covers that side.

When to see a physio or doctor

Get a stiff, painful shoulder examined early rather than waiting, and say you have diabetes at that first appointment. The frozen shoulder program and the three stages will make more sense once someone has confirmed that the arm stops in the same place whoever moves it.

Go back if night pain is still breaking your sleep after a few weeks, since that is one of the things an injection is used for, and sleeping with a frozen shoulder covers what to try first. Act on anything in the list below at the timing the line gives.

Related exercise programs

Warning signs

Get emergency help now

Chest pain or tightness, which may spread to your arm, neck or jaw, or shoulder or arm pain that comes with shortness of breath, sweating or feeling sick. This can be a heart attack. Call emergency services straight away.
The shoulder feels as if it has slipped out of place, looks a different shape or suddenly locks so you cannot move the arm, or the pain is severe after a fall or an injury. Go to an emergency department straight away, without driving yourself, and do not try to put the shoulder back in yourself.
Your arm, hand or fingers turn cold, pale, blue or gray compared with the other side. Call emergency services or go to an emergency department straight away, and do not drive yourself. The blood supply to the arm may be blocked.
You have a fever or feel unwell, or the shoulder is hot, red and swollen. This can be a joint infection. Go to an emergency department straight away.

Get help today

Sudden, very bad shoulder pain, or you suddenly cannot lift or move your arm at all. Get medical help the same day.
The pain started after a fall, a pull or another injury, especially if the arm has been weak since, for example you cannot lift it out to the side or hold it up. This can be a broken bone or a torn tendon. Get medical advice the same day, and say how it happened and that the arm has been weak since, because UK shoulder surgeons advise urgent referral for a rotator cuff tear caused by an injury.
Severe pain in both shoulders that has come on recently. Get medical advice the same day.
You are over 50 and have aching and stiffness in both shoulders, often in the neck or hips too, that is worst in the morning and lasts more than 45 minutes after you get up. This can be an inflammatory condition (polymyalgia rheumatica) rather than frozen shoulder. If you also get a new headache, pain or tenderness at your temples or on your scalp, or jaw pain when you eat or talk, get medical advice the same day, and if your vision changes, call emergency services. Even without those extra signs, see your doctor within a few days about the aching and stiffness.
Pins and needles or numbness in the arm that does not go away, no feeling in part of the arm, or weakness that is getting worse. Get medical advice the same day. For pain spreading down the arm from your neck, ask for an urgent appointment with your doctor. If one side of your face or body suddenly goes numb or weak, or your speech becomes slurred or muddled, call emergency services, even if it goes away.
Pain at night or at rest that is constant, that no rest or change of position eases at all, and that keeps getting worse. If you are being treated for cancer now, contact your cancer team the same day.

Book an appointment

Pain at night or at rest that is constant, that no rest or change of position eases at all, and that keeps getting worse. If you have had cancer, now or in the past, or are losing weight without trying, see your doctor sooner, within a day or two, and mention it. This applies even if the pain is not getting worse.
Night pain is common with this condition, but get checked within a few days if the pain is constant, no rest or change of position eases it at all, and it keeps getting worse.
New shoulder pain and you have had cancer, now or in the past, or you are losing weight without trying. See your doctor within a day or two and mention it.

Common questions

Will a steroid injection raise my blood sugar?

It can, for several days. A systematic review of blood glucose after steroid injections into a joint in people with diabetes found that levels can rise for several days afterward, and the authors advised monitoring for up to a week (Choudhry and colleagues, 2016). That is a reason to tell the doctor you have diabetes before the injection, not a reason to rule it out. Ask what to watch for, how often to test, and who to contact if your readings go higher than you expect. Whether the injection suits you is a decision to make with your own doctor.

Can frozen shoulder be a sign of undiagnosed diabetes?

The association runs in both directions. Zreik and colleagues concluded that frozen shoulder is common in people with diabetes and that diabetes is also common among people with frozen shoulder: their pooled estimate was 30 percent (95 percent confidence interval 24 to 37). That is why they suggested that screening for diabetes should be considered in people who turn up with a frozen shoulder (Zreik and colleagues, 2016). A frozen shoulder is not a diagnosis of diabetes, and plenty of people get one with perfectly normal blood sugar. If yours has not been checked for a while, ask your doctor to check it at the same appointment.

Does frozen shoulder last longer if you have diabetes?

It usually does, in two ways: more stiffness than average, and more months of it before the shoulder begins to free up. That is what OrthoInfo describes in people who have diabetes, and the same page says nobody has worked out why diabetes does it. Expect the same shape of recovery and a longer calendar. That changes how you plan rather than what you do: keep the exercises small and frequent, measure progress in reaches rather than weeks, and do not read a slow month as a sign the program is wrong.

Should I change my exercises because of diabetes?

The shoulder exercises stay as they are, set by how irritable the shoulder is. Two general points apply. If you have reduced feeling in your hands or feet from nerve damage, be careful with grip and with standing exercises, and tell your physio about it. Do not use heat on skin that has lost feeling or cannot feel heat properly, because it can scald or burn without you noticing. And if a steroid injection has just raised your blood sugar, that is a conversation for your diabetes team rather than a reason to stop moving the arm.

References

Zreik NH, Malik RA, Charalambous CP. Adhesive capsulitis of the shoulder and diabetes: a meta-analysis of prevalence. Muscles, Ligaments and Tendons Journal. 2016;6(1):26-34. https://pubmed.ncbi.nlm.nih.gov/27331029/
Dyer BP, Rathod-Mistry T, Burton C, van der Windt D, Bucknall M. Diabetes as a risk factor for the onset of frozen shoulder: a systematic review and meta-analysis. BMJ Open. 2023;13(1):e062377. https://pubmed.ncbi.nlm.nih.gov/36599641/
Choudhry MN, Malik RA, Charalambous CP. Blood glucose levels following intra-articular steroid injections in patients with diabetes: a systematic review. JBJS Reviews. 2016;4(3):e5. https://doi.org/10.2106/JBJS.RVW.O.00029
Kelley MJ, Shaffer MA, Kuhn JE, et al. Shoulder pain and mobility deficits: adhesive capsulitis. Clinical practice guidelines linked to the International Classification of Functioning, Disability, and Health from the Orthopaedic Section of the American Physical Therapy Association. Journal of Orthopaedic and Sports Physical Therapy. 2013;43(5):A1-A31. https://doi.org/10.2519/jospt.2013.0302
American Academy of Orthopaedic Surgeons. Frozen shoulder. OrthoInfo. https://www.orthoinfo.org/en/diseases--conditions/frozen-shoulder/

Written and checked by the PocketPhysio editorial team. Last updated 2026-10-18.

This page is general education, not a diagnosis or a personal treatment plan. See a physiotherapist or doctor for advice about your own situation.

Frozen shoulder and diabetes: why the link matters