Complex Regional Pain Syndrome (CRPS)

What is CRPS?

Complex regional pain syndrome (CRPS) is a rare pain disorder in which persistent pain, out of proportion to an injury, continues beyond the usual healing time, together with sensory, motor and autonomic changes.^{[1, 2]} It was formerly called reflex sympathetic dystrophy (type 1) and causalgia (type 2). Type 1 arises without a known nerve injury and type 2 follows a known nerve injury, but their features are hard to tell apart.^[1]

Common symptoms

The hallmark is severe burning or stabbing pain in a limb, often with pain from light touch (allodynia). Other features include swelling, skin that looks shiny, pale or discolored, changes in temperature and sweating, hair and nail changes, and weakness, stiffness or tremor.^{[1, 3]}

The condition also disrupts sleep and daily activities and often brings a heavy psychological and social burden.^[1]

Causes and risk factors

CRPS usually follows a fracture, surgery or other injury, although some cases have no clear trigger.^{[1, 2]} It occurs in about 7 percent of people with limb fractures, limb surgery or other injuries.^[3]

The cause is not fully understood. Contributors include sensitization of the peripheral and central nervous systems, inflammation, autonomic changes, possible immune mechanisms, genetic factors and mental health factors.^{[3, 4]} Female sex is consistently linked to higher risk.^[4]

How it is diagnosed and treated conventionally

CRPS is diagnosed from symptoms and examination, using the Budapest criteria, not from a single test.^{[1, 3]} Other conditions with similar features must be ruled out.

Treatment is multidisciplinary and centers on functional rehabilitation. Reviews suggest that physical and occupational therapy, bisphosphonates, calcitonin, corticosteroids for early disease, ketamine, sympathetic blocks to enable therapy, and spinal cord stimulation may help, although few high-quality trials exist.^{[3, 4]} The 2022 clinical guidelines also describe the research as generally low to medium quality, because the disease is rare and trials are small.^[5] Vitamin C may be preventive.^[4]

Many cases settle within the first year, and a smaller group goes on to chronic CRPS.^[3]

Why CRPS calls for a whole-person approach

CRPS is thought to have several overlapping mechanisms that differ from person to person and change over time, so no single measure is likely to address all of them.^{[3, 4]} Care that addresses movement, pain processing, sleep and stress alongside medical treatment is therefore reasonable.

Inflammation and the immune system

Early, "warm" CRPS has dominant inflammatory features, with swelling and redness, and immune and inflammatory changes are among the proposed mechanisms.^{[3, 4]}

Nervous system sensitization

Sensitization of the peripheral and central nervous systems, and changes in the brain, help explain why light touch can hurt.^{[2, 3]} CRPS is now classed as a chronic primary pain disorder.^[2]

Autonomic changes and circulation

Altered blood flow, temperature and sweating reflect autonomic involvement, and the condition may shift from warm to cold as it becomes chronic.^[3]

Movement and use of the limb

Stiffness and swelling can limit movement, and guidelines place functionally focused therapy at the center of care.^{[3, 4]} Mind-body practices and exercise are also studied for neuropathic pain.^[6]

Stress, mood and sleep

Psychological factors are listed among contributors to CRPS, and the condition itself disturbs sleep and mood.^{[1, 3]}

Acupuncture for CRPS

What the research shows

The evidence for acupuncture in CRPS is limited. A 2005 review of treatments for CRPS type 1 listed acupuncture among therapies to avoid because of lack of efficacy or lack of evidence.^[7] A 2023 review of complementary methods said acupuncture can be tried as an addition to guideline care.^[8] The 2022 Cochrane review of physiotherapy for CRPS included trials of electroacupuncture, but rated all the evidence it found as very low certainty and most trials as high risk of bias.^[9]

The clearest data come from CRPS after stroke, usually called shoulder-hand syndrome. A meta-analysis of 13 trials (1,040 people) found that electroacupuncture was better than conventional rehabilitation for pain, limb function, daily activities and swelling over 2 to 6 weeks, but the trials were of moderate quality with high heterogeneity.^[10] A review of 38 studies (3,184 people) found that adding acupuncture to rehabilitation improved motor function and pain, with low-certainty evidence and little adverse-event reporting.^[11] A 2025 review of 47 studies (4,129 people) found similar benefits, no difference in adverse events, and low-certainty evidence.^[12] Most of these trials were done in China, and the results may not apply to CRPS after injury.

A Cochrane review of acupuncture for neuropathic pain in general found very low-quality evidence and concluded there was not enough to support or refute its use.^[13]

How acupuncture may work

Researchers propose that acupuncture strengthens the body's descending pain-inhibiting pathways and may lower local inflammatory mediators, which could ease central sensitization.^[14] A review that discussed CRPS type 1 also proposes release of neuropeptides that widen blood vessels and have anti-inflammatory effects.^[15] These are hypotheses, not confirmed mechanisms in CRPS.

What treatment involves

Treatment uses fine, sterile, single-use needles placed at points on the affected and unaffected limbs and elsewhere on the body, usually left in place for about 20 to 40 minutes. A short course of visits is followed by a reassessment. Because light touch can be painful in CRPS, the practitioner can work around the most sensitive areas and adjust to your comfort.

Minor reactions such as pain or bleeding at a needle site occurred in about 9 in 100 patients in prospective studies, and serious events occurred in about 1 in 10,000.^[16] Tell the practitioner first if you have a bleeding disorder, take blood thinners, are pregnant, or have a pacemaker or spinal cord stimulator, which matters for electroacupuncture.

Ayurvedic medicine for CRPS

The Ayurvedic view

Ayurveda has no classical diagnosis that matches CRPS exactly. Burning, shifting pain, dryness and sensitivity might be described as aggravated Vata, sometimes with Pitta features when there is heat and redness. This is a traditional framework used to choose care, not a biomedical diagnosis.

Therapies that may be used

Care is chosen for the individual and, as a supportive measure, may include:

• Diet and daily routine, such as regular meals and steady sleep hours
• Gentle breathing, relaxation and yoga-type practices, which reviews of complementary care and of exercise for neuropathic pain discuss as ways to support coping and function^{[6, 8]}
• Light, warm oil massage away from the most sensitive skin, only if touch is tolerated
• Herbs prescribed individually after your medicines are reviewed
• Herbal preparations applied to the skin (transdermal medication therapy), considered case by case

Panchakarma procedures are not appropriate during pregnancy, acute illness or frailty. They are also a poor fit for a limb with active swelling, severe touch sensitivity or marked skin changes, and are considered only with your physician's agreement.

What the research shows

No clinical studies of Ayurvedic medicine for CRPS were found in PubMed. Nothing is known about whether Ayurvedic treatments change pain or function in CRPS. One review of complementary methods says that herbal products such as turmeric and stinging nettle have anti-inflammatory effects, and that mind-body practices such as relaxation and yoga may support coping, pain and mood, but this review is not a trial of those methods in CRPS.^[8]

Herbal medicine for CRPS

Herbs and formulas that have been studied

No herb or formula has been tested in a clinical trial for CRPS itself. Turmeric and stinging nettle are named as plausible anti-inflammatory options in one review of complementary methods.^[8] A systematic review of supplements for chronic neuropathic pain found three CRPS studies, all of vitamin C, and no herbal products for CRPS.^[17] Vitamin C is a vitamin, not a herb, and its role is as a preventive after fractures that your physician should direct.

What the research shows

There is no research on Chinese or Ayurvedic herbal formulas for CRPS. The supplement review found vitamin C looked promising for preventing CRPS type 1 and recommended further research.^[17] Any herbal care would be aimed at general symptoms such as sleep and stress and would not be expected to treat CRPS itself.

Safety and herb-drug interactions

Many people with CRPS take several prescription medicines, such as anticonvulsants, antidepressants, opioids or steroids, and herbs can interact with medicines. A review found that dozens of herbs, foods and supplements are reported to interact with warfarin, with some causing serious bleeding.^[18] Herbal and dietary supplements are also a recognized cause of liver injury.^[19]

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

This is interpretation, not equivalence. Chinese medicine describes CRPS-like pain, swelling and temperature change as stagnation of qi and blood, sometimes with heat or dampness. Ayurveda describes aggravated Vata. Researchers instead study nerve sensitization, inflammation, blood vessel and autonomic changes, and the brain's handling of pain.^{[2, 3]}

Proposed acupuncture mechanisms, such as stronger descending pain inhibition and lower inflammatory mediators, loosely parallel the traditional idea of restoring free flow.^{[14, 15]} No study has shown that qi, blood stasis or a dosha corresponds to a specific biological process in CRPS.

How this care fits with your medical care

Integrative care for CRPS is complementary. Stay under the care of your physician or pain specialist, keep up your physical or occupational therapy, and do not stop or change prescribed medicines or procedures without your prescriber. For a condition like this, we ask that you are under a physician's care for it and that your treating team knows you are receiving complementary care.

We do not diagnose CRPS or manage it medically. Please bring your diagnosis, a list of medicines and supplements, notes on any nerve blocks, infusions or implanted devices, and recent test results.

When to seek urgent medical care

New or rapidly changing symptoms in an affected limb need prompt medical assessment, because other conditions can look like CRPS.^[1]

• Sudden severe pain, swelling, redness or warmth with fever or chills, which can signal infection
• A limb that turns blue, white or cold, or loses its pulse
• New weakness, numbness, or loss of bladder or bowel control
• Skin breakdown, open sores or ulcers that are not healing

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