Raynaud’s Phenomenon

What is Raynaud's Phenomenon?

Raynaud's phenomenon is a temporary, exaggerated narrowing of the small arteries in the fingers and toes in response to cold or emotional stress.^[1] It is either primary, with no underlying cause, or secondary to another condition, most often an autoimmune disease such as systemic sclerosis (scleroderma).^[2] It affects roughly 5% of the population.^[3]

Common symptoms

Attacks cause the digits to turn pale or white as blood flow drops, then often blue, and then red as blood flow returns.^[2] The fingers or toes may feel cold, numb, tingly or painful, and episodes usually last from a few minutes up to about an hour.^[1]

The ears, nose or lips can also be affected. In secondary Raynaud's, severe attacks can lead to painful skin sores (digital ulcers) and, in rare cases, tissue damage.^[2]

Causes and risk factors

In primary Raynaud's the vessels over-react without any damage to their structure, and genetic and hormonal (estrogen) factors are thought to contribute.^[2] Secondary Raynaud's occurs with autoimmune and connective tissue diseases, other blood vessel diseases, and some nerve conditions.^[2] Primary Raynaud's most often affects young women.^[3]

Other contributors include repetitive vibration injury from tools, and medicines such as beta-blockers and some chemotherapy drugs.^[1]

How it is diagnosed and treated conventionally

Raynaud's is mainly a clinical diagnosis based on your description of attacks.^[4] A physician looks for signs of an underlying disease, and nailfold capillaroscopy, a microscope look at the tiny vessels at the base of the nails, helps tell primary from secondary Raynaud's.^[2]

First steps are warmth and stress management. If these are not enough, vasodilator medicines such as nifedipine are first-line treatment, and phosphodiesterase-5 inhibitors or prostaglandin analogs are alternatives for people who do not respond or who have tissue damage.^[2] For secondary Raynaud's, a systematic review found clear evidence for calcium channel blockers and iloprost and limited or conflicting evidence for most other treatments.^[5]

Why Raynaud's Phenomenon calls for a whole-person approach

Raynaud's involves blood vessels, nerves, hormones and the immune system together, and the balance between vessel narrowing and widening can be tipped by several factors.^[2] That is why a single approach rarely covers everything.

Complementary care is aimed at the things people notice most: how often attacks happen, how uncomfortable they are, and how well they cope with cold and stress. Medical evaluation comes first, because Raynaud's can be the first sign of another disease.^[3]

Blood vessel and nerve control

The vessels of the fingers are controlled by nerves and by chemical signals that tighten or relax them, and in Raynaud's this balance is disturbed.^[2] This is the part that vasodilator drugs target, and it is also the proposed target of acupuncture research.^[6]

Cold and emotional stress

Both cold and emotional stress trigger attacks.^[1] Stress management is part of standard first-line advice.^[2] A review of complementary treatments found biofeedback did not reduce attacks, so not every relaxation method has been shown to help.^[7]

An underlying autoimmune or vascular disease

Raynaud's is often the presenting symptom of connective tissue disease, especially systemic sclerosis, so new Raynaud's in adulthood deserves medical assessment.^[3] In systemic sclerosis, digital ischemia can be made worse by progressive damage to the small vessels themselves.^[4]

Hormones

Estrogen is among the factors thought to contribute to Raynaud's, which fits with its higher frequency in women.^[2]

Acupuncture for Raynaud's Phenomenon

What the research shows

The evidence suggests acupuncture may reduce Raynaud's attacks, but it is limited by small and low-quality trials. A 2023 meta-analysis of 6 trials with 272 participants found that acupuncture was associated with more remission, fewer daily attacks and more positive cold-stimulation tests. However, a network analysis was not significant, and the authors cited small samples, very low-quality evidence and high risk of bias.^[8]

One of the older trials randomized 33 patients with primary Raynaud's to seven acupuncture treatments or a control group over a winter period. Attack frequency fell from 1.4 to 0.6 per day in the treated group, and the overall reduction in attacks was 63% versus 27% in controls.^[9] A later uncontrolled study of 26 patients given auricular electroacupuncture reported fewer and less painful attacks, with the improvement still present at 24 weeks, but skin temperature and blood flow did not change.^[6]

For secondary Raynaud's, only a single acupuncture trial was identified in a systematic review, so little can be said.^[5]

How acupuncture may work

Researchers have suggested that acupuncture could affect skin blood flow and how cold is perceived.^[6] The one study that measured this found fewer attacks without any change in skin temperature or blood flow, so how acupuncture might help is unclear.^[6] Any mechanism is a proposal, not an established fact.

What treatment involves

Treatment uses fine, sterile, single-use needles, usually left in place for about 20 to 40 minutes. A course is several visits with reassessment. One of the trials gave seven treatments over two weeks.^[9]

Common minor effects include brief bleeding, soreness or bruising at a needle site, with about 9 in 100 patients affected in prospective studies and serious events in about 1 in 10,000 patients.^[10] Tell the practitioner first if you have a bleeding disorder, take blood thinners, are pregnant, or have a pacemaker (relevant to electroacupuncture). If you have digital ulcers or sores, tell us so that needling away from those areas can be considered.

Ayurvedic medicine for Raynaud's Phenomenon

The Ayurvedic view

Ayurveda has no exact classical equivalent for Raynaud's. Cold, pale, numb extremities that worsen in cold weather are traditionally described as a Vata imbalance, with cold and dry qualities and sluggish circulation in the body's channels. This is a traditional framework, not a biomedical diagnosis.

Therapies that may be used

Care is chosen for the individual and traditionally combines:

• Warm, cooked, regular meals and avoiding cold food and drink
• Daily routine, adequate sleep and gentle regular exercise
• Warm oil massage of the hands and feet, and keeping the body warm
• Herbs prescribed individually by a qualified practitioner, such as warming spices or ginger-based preparations

Panchakarma is not appropriate during pregnancy, acute illness or frailty, and it is not suitable for people with digital ulcers or with significant underlying disease unless your physician agrees. Transdermal medication therapy, an herbal preparation applied to the skin, may be considered for the hands and feet; no studies of it in Raynaud's were found.

What the research shows

No clinical trials or systematic reviews of Ayurvedic treatment for Raynaud's phenomenon were found in PubMed. Whether Ayurvedic therapies change attack frequency is therefore unknown. A review of 20 trials of complementary treatments for Raynaud's likewise covered acupuncture, biofeedback, supplements, laser and gloves but no Ayurvedic treatment.^[7] Supportive elements such as keeping warm and managing stress are standard medical advice and do not depend on Ayurveda.^[2]

Herbal medicine for Raynaud's Phenomenon

Herbs and formulas that have been studied

Two lines of research stand out. Ginkgo biloba extract has been tested in randomized trials in primary Raynaud's.^{[11, 12, 13]} Chinese formulas, including Danggui Sini Tang and Buyang Huanwu Tang, have been tested in primary Raynaud's, usually against nifedipine.^[14]

What the research shows

Results for ginkgo are mixed. A small placebo-controlled trial reported fewer attacks per week with a ginkgo preparation than with placebo.^[11] A later placebo-controlled pilot of 41 patients found no significant difference from placebo in attack frequency, duration or severity.^[12] In a Korean trial of 93 patients, nifedipine reduced attacks more than ginkgo.^[13]

A meta-analysis of 8 trials with 674 participants found that Chinese herbal medicine may help primary Raynaud's, but the methods were generally poor and the authors called the benefit inconclusive. None of the trials reported attack frequency or adverse events.^[14] A broader review of herbal medicine for cold hands and feet, including Raynaud's, found improvements in 14 trials (974 participants) but a high risk of bias in all of them.^[15]

Safety and herb-drug interactions

Herbs can interact with the medicines used for Raynaud's and related diseases. A review of herb-drug interactions reports bleeding when ginkgo was combined with warfarin or aspirin, and lowered levels of cyclosporine and tacrolimus with St. John's wort; many of these reports come from case reports and limited observations.^[16] A systematic review also lists ginger and ginkgo among herbs that can raise bleeding risk with warfarin.^[17]

Quality matters. About one fifth of Ayurvedic medicines bought online contained detectable lead, mercury or arsenic.^[18] A case report describes kidney damage in a woman with CREST syndrome after years of a Chinese herbal regimen found to contain aristolochic acid, so products must come from tested sources.^[19] Tell us if you are pregnant or breastfeeding, have liver or kidney disease, or take blood pressure medicine, since nifedipine and similar drugs lower blood pressure.

Translating traditional medicine into modern biological language

The links below are interpretation, not equivalence. Chinese medicine often describes cold, pale fingers as cold stagnation or poor flow of qi and blood to the extremities, and formulas such as Danggui Sini Tang are named for warming the channels and nourishing blood. Modern researchers describe overlapping ideas in terms of digital artery narrowing and the nerve and chemical signals that control it.^[2]

Ayurveda's aggravated Vata, with cold and sluggish circulation, resembles in broad terms the cold-triggered vessel narrowing seen in Raynaud's. No study has shown that a dosha or a channel corresponds to a specific biological process.

How this care fits with your medical care

Complementary care for Raynaud's works alongside your physician's care. Keep any prescribed vasodilators and other medicines, and do not stop or change them without your prescriber. Because Raynaud's can signal an autoimmune disease, we ask that you have been medically evaluated for it.

We do not diagnose Raynaud's or its cause. Please bring your diagnosis, the results of any capillaroscopy or blood tests, and a full list of medicines and supplements. If you have secondary Raynaud's from a condition such as systemic sclerosis or lupus, we ask that you are under a physician's care for it and that your treating team knows you are receiving complementary care.

When to seek urgent medical care

Some symptoms point to tissue damage or a serious underlying problem and need prompt medical assessment.^[2]

• A finger or toe that stays white, blue or black and numb after you warm up
• A painful open sore, ulcer or sign of infection on a fingertip or toe
• Attacks that are new, severe or worsening, or that affect only one hand or foot
• New skin tightening, joint pain, rash, mouth sores or trouble swallowing alongside Raynaud's
• Raynaud's that begins after starting a new medicine

If a digit is very painful, discolored or you suspect tissue death, or you have chest pain or trouble breathing, call 911 or go to the nearest emergency department.