Frozen Shoulder

What is Frozen Shoulder?

Frozen shoulder is a condition in which the lining of the shoulder joint becomes thickened and scarred, causing pain and a progressive loss of shoulder movement. It most often affects middle-aged adults and has a long course that can be frustrating.^{[1, 2]}

Common symptoms

The main symptoms are shoulder pain and stiffness that make it hard to move the arm in every direction, including passive movement by someone else.^[2] Many people notice that the pain comes first, then the stiffness takes over.

Typically the condition passes through three overlapping stages:

• A painful "freezing" stage, with aching that can be worse at night or with movement
• A "frozen" stage, in which pain may ease but stiffness is greatest and everyday tasks such as dressing, combing hair or reaching overhead become hard
• A "thawing" stage, in which movement slowly returns

The stages vary a lot from person to person.

Causes and risk factors

In many people no clear cause is found. The condition is linked to fibrosis, the build-up of tight scar-like tissue in the joint capsule, along with inflammation.^[2] It can follow a period of immobilization, such as after an injury or surgery.^[2]

Diabetes and thyroid disease are the best-known risk factors. A meta-analysis found that people with diabetes had about 3.7 times the odds of developing frozen shoulder, though most of the studies were at high risk of bias.^[3] Another meta-analysis found thyroid disease, especially an underactive thyroid, to be more common in people with frozen shoulder.^[4]

How it is diagnosed and treated conventionally

Diagnosis rests mainly on your history and a physical examination of shoulder movement. It can be hard when another shoulder problem is also present, and imaging is used to rule out other causes such as arthritis or a rotator cuff tear.^{[1, 2]}

Care usually includes physical therapy, anti-inflammatory medicines, steroid injections, hydrodilatation (stretching the joint with injected fluid) and sometimes surgery, although how well each works is not fully settled.^[2] A 2020 meta-analysis found that a steroid injection into the joint gave the clearest short-term pain and function benefit, especially early in the condition, and recommended pairing it with a home exercise program.^[5]

Frozen shoulder is often self-limiting over roughly one to three years, but recovery is sometimes incomplete.^[6] Exercise therapy has been found to improve movement, function and pain.^[7]

Why Frozen Shoulder calls for a whole-person approach

Frozen shoulder is not only a stiff joint. Inflammation, scar-like tissue change, whole-body conditions such as diabetes and thyroid disease, and long periods of guarding the arm all appear to play a part.^{[2, 3]}

Because of this, care that addresses pain, movement and general health together is a reasonable addition to the treatment your physician or therapist directs.

Inflammation and fibrosis in the capsule

Research on the tissue shows fibroblasts turning into contractile cells that lay down collagen, together with inflammation and new blood vessel and nerve growth in the capsule.^[2] This is why the shoulder both hurts and tightens.

Metabolic and hormonal health

Diabetes and thyroid disease are linked to a higher chance of developing frozen shoulder.^{[3, 4]} Keeping these conditions well managed with your physician is part of overall care. The studies are observational, so they show an association and cannot prove cause.

Immobility and guarding

Frozen shoulder often follows a period in which the arm was not moved, such as after an injury or surgery.^[2] Pain makes people protect the arm, which can add to stiffness. Supervised exercise is a main part of recovery.^[7]

Pain and sleep

Night pain is common and can disrupt sleep. We could not find a study measuring this link in frozen shoulder specifically, so this is a general clinical observation and not a research finding.

Acupuncture for Frozen Shoulder

What the research shows

Research suggests acupuncture may reduce pain and improve shoulder function in frozen shoulder, but the evidence is of limited quality. Many trials are small and at risk of bias.

A 2022 meta-analysis of 13 studies with 936 patients found that electroacupuncture improved pain, function and response rates compared with manual acupuncture, and that it helped as an add-on to other treatment. The results varied widely between studies.^[8] A 2024 meta-analysis of 13 studies found that adding acupuncture to physical therapy reduced pain and improved range of motion more than physical therapy alone, again with considerable differences between studies.^[9]

A 2025 network meta-analysis of 84 trials with 7,125 patients compared 17 interventions, mostly acupuncture-related treatments, including warm needle, needle knife and floating needle techniques. Several appeared helpful, but the certainty of evidence was low to moderate. Pain relief from Western medicine was slightly greater than from acupuncture-based treatments, though the difference was not statistically significant.^[10]

Earlier evidence was weaker. A Cochrane review of acupuncture for shoulder pain, covering several shoulder problems, found little evidence either way, with possible short-term benefit for pain and function.^[11] A systematic review of treatments for frozen shoulder noted that many studies were at high risk of bias and small.^[6]

A 2023 evidence-based guideline on traditional Chinese medicine for frozen shoulder made twelve recommendations, covering manual therapy, acupuncture and exercise among others, most of them weak or based on consensus.^[12]

How acupuncture may work

Researchers propose that acupuncture affects pain through the nerves and immune cells near the needle and through pain pathways in the spinal cord and brain, including the body's own opioid-like and other signaling systems.^[13] This work comes largely from laboratory studies of inflammatory pain, not from studies of frozen shoulder, so it is a proposed explanation and not a settled fact.

What treatment involves

Treatment uses fine, sterile, single-use needles placed at points around the shoulder, arm and sometimes distant points, usually left in place for about 20 to 40 minutes. Some practitioners add mild electrical stimulation or moxibustion (warming with burning mugwort). We reassess after a short course of visits to see whether pain or movement is changing, and acupuncture is best combined with the shoulder exercises your therapist advises.

Serious problems are rare. In prospective studies, about 9 in 100 patients had a minor reaction such as bleeding, soreness or redness at a needle site, and serious events occurred in about 1 in 10,000 patients.^[14] Tell the practitioner first if you have a bleeding disorder, take blood thinners, are pregnant, or have a pacemaker (relevant to electroacupuncture).

Ayurvedic medicine for Frozen Shoulder

The Ayurvedic view

Ayurveda describes frozen shoulder as Avabahuka or Apabahuka, a Vata disorder of the shoulder joint, in which dryness and loss of lubricating qualities in the joint are said to cause pain and stiffness.^[15] This is a traditional framework used to choose treatment, not a biomedical diagnosis.

Therapies that may be used

Care is chosen for the individual and traditionally combines:

• Diet and daily routine intended to calm Vata, such as warm, regular meals and steady sleep
• Warm oil massage (Snehana) and herbal steam or sweating therapy (Swedana) around the shoulder
• Herbs such as ashwagandha-based oils, nirgundi (Vitex negundo) leaf, and formulas used in classical practice, prescribed individually^[16]
• Nasya, oil applied through the nose, which has been used in Ayurvedic studies of Apabahuka^[15]
• Gentle yoga postures, which are best coordinated with your physical therapist

Panchakarma procedures are not appropriate during pregnancy, acute illness or frailty, or before red-flag symptoms have been medically assessed.

What the research shows

The research on Ayurveda for frozen shoulder is very limited. A PubMed search found no systematic reviews and no placebo-controlled trials of Ayurvedic treatment.

The available reports are weak. A single-patient case report described improvement with oral herbal formulas and oil massage, but one case cannot show that treatment caused the change.^[16] A small study of 15 patients given nasya with medicated oil for seven days reported partial improvement in most, with no comparison group.^[15]

A randomized trial of 72 patients tested a standing yoga posture routine added to conventional care and found no added benefit over conventional care alone after four weeks.^[17] Because frozen shoulder often improves with time, studies without a comparison group cannot show that a treatment works.^[6]

Herbal medicine for Frozen Shoulder

Herbs and formulas that have been studied

Chinese medicine uses herbal plasters applied to the skin as well as oral formulas for frozen shoulder. A 2023 guideline on traditional Chinese medicine for the condition included recommendations on named plasters, Cheezheng Xiaotong plaster and Gutong plaster.^[12] Ayurvedic practice uses herbs such as ashwagandha-based oils and nirgundi.^[16] Herbal preparations applied to the skin are also part of the clinic's transdermal medication therapy.

What the research shows

The evidence for herbal medicine in frozen shoulder is very limited. The guideline's recommendations were mostly weak or consensus-based, and its abstract does not report how well individual herbal products worked.^[12] We found no systematic review or placebo-controlled trial of an oral herb or formula for frozen shoulder itself. Evidence for herbs in other joint and muscle pain should not be assumed to apply.

Safety and herb-drug interactions

Herbs are active substances and can interact with medicines. Case reports describe bleeding when warfarin was combined with herbs including dang gui (Angelica sinensis), dan shen (Salvia miltiorrhiza), ginger, ginseng and Boswellia.^[18] A literature review also found that herbal products can interact with many other drugs, often on the basis of case reports.^[19] People who take blood thinners, diabetes medicine or thyroid medicine need a practitioner's review before using herbs.

In one study, about one fifth of Ayurvedic products bought online contained detectable lead, mercury or arsenic.^[20] Herbs should come from tested sources and be prescribed individually. Tell us if you are pregnant or breastfeeding, or have liver or kidney disease.

Translating traditional medicine into modern biological language

The links drawn here are interpretation, not equivalence. Chinese medicine often describes shoulder stiffness and pain as obstruction of qi and blood in the channels, sometimes with cold and dampness. Researchers study things that loosely parallel this picture, such as local tissue inflammation, nerve signaling and how the nervous system amplifies pain.^[13]

Ayurveda's aggravated Vata describes dryness, stiffness and pain in the joint. Researchers describe frozen shoulder in terms of fibrosis and inflammation of the capsule.^[2] No study has shown that a dosha or a channel corresponds to a specific biological process.

How this care fits with your medical care

Integrative care for frozen shoulder is complementary. Keep your physician, orthopedist or physical therapist, and do not stop or change prescribed medicines or planned injections without your prescriber. We do not diagnose the cause of shoulder pain, so new shoulder pain should be medically evaluated first.

Please bring your diagnosis, any imaging reports, a full list of medicines and supplements, and details of any injections, manipulation or surgery, planned or past. If you have diabetes or a thyroid condition, your treating team should know you are receiving complementary care.

When to seek urgent medical care

Some shoulder symptoms point to a problem other than frozen shoulder and need prompt medical assessment.

• Shoulder, arm or jaw pain with chest pressure, shortness of breath, sweating or nausea
• Shoulder pain with fever, redness, warmth or swelling of the joint
• Sudden shoulder pain after a fall or injury, or a visibly deformed shoulder
• New weakness, numbness or tingling in the arm or hand
• Shoulder pain with unexplained weight loss or a history of cancer

If any of these occur, call 911 or go to the nearest emergency department.