|Classification and external resources|
Hands with Raynaud's phenomenon
In medicine, Raynaud's phenomenon (pron.: //) is a vasospastic disorder causing discoloration of the fingers, toes, and occasionally other areas. This condition may also cause nails to become brittle with longitudinal ridges. Named after French physician Maurice Raynaud (1834–1881), the phenomenon is believed to be the result of vasospasms that decrease blood supply to the respective regions. Stress and cold are classic triggers of the phenomenon.
Raynaud's phenomenon includes Raynaud's disease (also known as "Primary Raynaud's phenomenon") where the phenomenon is idiopathic, and Raynaud's syndrome (secondary Raynaud's), where it is caused by some other instigating factor, most commonly connective tissue disorders such as systemic lupus erythematosus. Measurement of hand-temperature gradients is one tool used to distinguish between the primary and secondary forms.
Raynaud's phenomenon is an exaggeration of vasomotor responses to cold or emotional stress. More specifically, it is a hyperactivation of the sympathetic nervous system causing extreme vasoconstriction of the peripheral blood vessels, leading to tissue hypoxia. Chronic, recurrent cases of Raynaud phenomenon can result in atrophy of the skin, subcutaneous tissues, and muscle. In rare cases it can cause ulceration and ischemic gangrene.
The condition can cause pain within the affected extremities, discoloration (paleness), and sensations of cold and/or numbness. This can often be distressing to those who are not diagnosed, and sometimes it can be obstructive. If someone with Raynaud's is placed in too cold a climate, it could potentially become dangerous.
- When exposed to cold temperatures, the blood supply to the fingers or toes, and in some cases the nose or earlobes, is markedly reduced; the skin turns pale or white (called pallor), and becomes cold and numb.
- When the oxygen supply is depleted, the skin colour turns blue (called cyanosis).
- These events are episodic, and when the episode subsides or the area is warmed, the blood flow returns and the skin colour first turns red (rubor), and then back to normal, often accompanied by swelling, tingling, and a painful "pins and needles" sensation.
All three colour changes are observed in classic Raynaud's. However, not all patients see all of the aforementioned colour changes in all episodes, especially in milder cases of the condition. Symptoms are thought to be due to reactive hyperemias of the areas deprived of blood flow.
In pregnancy, this sign normally disappears owing to increased surface blood flow. Raynaud's also has occurred in breastfeeding mothers, causing nipples to turn white and become extremely painful. Nifedipine, a calcium channel blocker and vasodilator, was recommended to increase blood flow to the extremities and noticeably relieved pain to the breast in an extremely small study group.
It is important to distinguish Raynaud's disease from syndrome. In order to diagnose these two forms of Raynaud's, a doctor may look for signs of arthritis or vasculitis and may conduct a number of laboratory tests.
Primary Raynaud's (disease) 
Raynaud's disease, or "Primary Raynaud's", is diagnosed if the symptoms are idiopathic, that is, if they occur by themselves and not in association with other diseases. Some refer to Primary Raynaud's disease as "being allergic to coldness." It often develops in young women in their teens and early adulthood. Primary Raynaud's is thought to be at least partly hereditary, although specific genes have not yet been identified.
Secondary Raynaud's (syndrome) 
Raynaud's syndrome, or "Secondary Raynaud's," occurs secondary to a wide variety of other conditions. Secondary Raynaud's has a number of associations:
- Connective tissue disorders:
- Eating disorders
- Obstructive disorders
- Physical Trauma, such as that sustained in auto accident or other traumatic events
- Lyme Disease
- reflex sympathetic dystrophy
- carpal tunnel syndrome
- Magnesium Deficiency
- Multiple Sclerosis
- Erythromelalgia (the opposite of Raynaud's, with hot and warm extremities) often co-exists in patients with Raynaud's)
It is important to realize that Raynaud's can herald these diseases by periods of more than twenty years in some cases, making it effectively their first presenting symptom. This may be the case in the CREST syndrome, of which Raynaud's is a part.
Patients with Secondary Raynaud's can also have symptoms related to their underlying diseases. Raynaud's phenomenon is the initial symptom that presents for 70% of patients with scleroderma, a skin and joint disease.
When Raynaud's phenomenon is limited to one hand or one foot, it is referred to as Unilateral Raynaud's. This is an uncommon form, and it is always secondary to local or regional vascular disease. It commonly progresses within several years to affect other limbs as the vascular disease progresses.
A careful medical history will often reveal whether the condition is primary or secondary. Once this has been established, an examination is largely to identify or exclude possible secondary causes.
- Digital artery pressure: pressures are measured in the arteries of the fingers before and after the hands have been cooled. A decrease of at least 15 mmHg is diagnostic (positive).
- Doppler ultrasound: to assess blood flow.
- Full blood count: this may reveal a normocytic anaemia suggesting the anaemia of chronic disease or renal failure.
- Blood test for urea and electrolytes: this may reveal renal impairment.
- Thyroid function tests: this may reveal hypothyroidism.
- An autoantibody screen, tests for rheumatoid factor, Erythrocyte sedimentation rate, and C-reactive protein, which may reveal specific causative illnesses or a generalised inflammatory process.
- Nail fold vasculature: this can be examined under the microscope.
Treatment options are dependent on the type of Raynaud's present. Raynaud's syndrome is treated primarily by addressing the underlying cause but includes all options for Raynaud's disease as well. Treatment of primary Raynaud's focuses on avoiding triggers.
General care 
- Environmental triggers should be avoided, e.g. cold, vibration, etc.
- Emotional stress is another recognized trigger.
- Extremities should be kept warm (wear extra socks or gloves if needed)
- Consumption of caffeine and other stimulants and vasoconstrictors must be prevented.
Emergency measures 
- If white finger (Raynaud's) occurs unexpectedly and a source of warm water is available, allow tepid to slightly warm water to run over the affected digits while you gently massage the area. Continue this process until the white area returns to its normal, healthy color.
- If triggered by exposure in a cold environment and no warm water is available, place the affected digits in a body cavity—armpit, crotch, or even the mouth. Keep the affected area warm at least until the whiteness returns to its normal, healthy color. Get out of the cold as soon as possible.
- A useful method exists to take measures ensuring circulation is restored quickly, though this should not be attempted if other circulatory issues are present that disallow fast or vigorous movement. This method is achieved by "windmilling" the arms (swinging them in large circles) reasonably quickly to force the blood to the hands and fingers. This can cause dizziness, so it should be attempted only for a short time before stopping for a minute and subsequently continuing. A less effective (but less conspicuous) variation is to swing the arms back and forth in a part of a circle to achieve the same results. This variation does take longer, though, and requires swifter movement of the arms, so it is advised to use the first variation if possible.
Drug therapy 
- Treatment for Raynaud's phenomenon may include prescription medicines such as calcium channel blockers (nifedipine) or diltiazem. It has the usual common side effects of headache, flushing, and ankle edema; but these are not typically of sufficient severity to require cessation of treatment.
- Calcium channel blockers can be helpful for the treatment of Raynaud's phenomenon.
- There is some evidence that Angiotensin II receptor antagonists (often Losartan) reduce frequency and severity of attacks, and possibly better than nifedipine.
- In a study published in the November 8, 2005 issue of Circulation, sildenafil (Viagra) improved both microcirculation and symptoms in patients with secondary Raynaud's phenomenon resistant to vasodilatory therapy. The authors, led by Dr Roland Fries (Gotthard-Schettler-Klinik, Bad Schönborn, Germany), report: "In the present study, capillary blood flow was severely impaired and sometimes hardly detectable in patients with Raynaud's phenomenon. Sildenafil led to a more than 400% increase of flow velocity."
- Fluoxetine, a selective serotonin reuptake inhibitor, and other antidepressant medications may reduce the frequency and severity of episodes if caused mainly by psychological stress.
- RayVa is a topical cream for the treatment of Raynaud's phenomenon. It contains prostaglandin E1 as the active ingredient and a permeation enhancer DDAIP which facilitates the delivery of the drug into the blood stream.
Surgical Intervention 
- In severe cases, a sympathectomy procedure can be performed. Here, the nerves that signal the blood vessels of the fingertips to constrict are surgically cut. Microvascular surgery of the affected areas is another possible therapy. Infusions of prostaglandins, e.g. prostacyclin, may be tried, with amputation in exceptionally severe cases.
- A more recent treatment for severe Raynaud's is the use of Botox. The 2009 article studied 19 patients ranging in age from 15 to 72 years with severe Raynaud's phenomenon of which 16 patients (84%) reported pain reduction at rest. 13 patients reported immediate pain relief, 3 more had gradual pain reduction over 1–2 months. All 13 patients with chronic finger ulcers healed within 60 days. Only 21% of the patients required repeated injections. A 2007 article describes similar improvement in a series of 11 patients. All patients had significant relief of pain.
Alternative and experimental (research) approaches 
- The extract of the Ginkgo biloba leaves (Egb 761, 80 mg) may reduce frequency of attacks.
- Two separate gels combined on the fingertip (somewhat like two-part epoxy, they cannot be combined before use because they will react), increased blood flow in the fingertips by about three times. One gel contained 5% sodium nitrite and the other contained 5% ascorbic acid. The milliliter of combined gel covered an area of ~3 cm². The gel was wiped off after a few seconds.
- Piracetam, a nootropic drug, can be useful as a long-term treatment for vasospastic disorders.
- Arginine is a precursor for the synthesis of nitric oxide, which is a powerful vasodilator.
- Milder cases of Raynaud's can often be addressed by biofeedback or other techniques to help control involuntary body functions like skin temperature.
- Fish oil supplements which contain long-chain omega-3 fatty acids may help to control symptoms of primary Raynaud's. There are few studies in the medical literature dealing with this subject, however, in one 1989 controlled, double-blinded study of 32 patients, consumption of roughly 6.5 grams of long chain omega-3 fatty acids in the form of fish oil significantly increased the time to onset or entirely prevented symptoms in response to cold in patients with primary Raynaud's. Lower doses of fish oil such as may be commonly available from commercial vendors have not been studied and may not be as effective.
- Vitamin D is also shown to be helpful in improving the symptoms of Raynaud's phenomenon
See also 
- "Raynaud disease" at Dorland's Medical Dictionary
- Anderson ME, Moore TL, Lunt M, Herrick AL (March 2007). "The 'distal-dorsal difference': a thermographic parameter by which to differentiate between primary and secondary Raynaud's phenomenon". Rheumatology 46 (3): 533–8. doi:10.1093/rheumatology/kel330. PMID 17018538.
- Cotran, Ramzi S.; Kumar, Vinay; Fausto, Nelson; Nelso Fausto; Robbins, Stanley L.; Abbas, Abul K. (2005). Robbins and Cotran pathologic basis of disease. St. Louis, Mo: Elsevier Saunders. p. 542. ISBN 0-7216-0187-1.
- Holmen OL, Backe B (2009). "An underdiagnosed cause of nipple pain presented on a camera phone". BMJ 339: b2553. doi:10.1136/bmj.b2553.
- Anderson JE, Held N, Wright K (April 2004). "Raynaud's phenomenon of the nipple: a treatable cause of painful breastfeeding". Pediatrics 113 (4): e360–4. doi:10.1542/peds.113.4.e360. PMID 15060268.
- Pistorius MA, Planchon B, Schott JJ, Lemarec H (February 2006). "[Heredity and genetic aspects of Raynaud's disease]". Journal Des Maladies Vasculaires (in French) 31 (1): 10–5. doi:10.1016/S0398-0499(06)76512-X. PMID 16609626.
- Gayraud M (January 2007). "Raynaud's phenomenon". Joint, Bone, Spine 74 (1): e1–8. doi:10.1016/j.jbspin.2006.07.002. PMID 17218139.
- Berlin AL, Pehr K (March 2004). "Coexistence of erythromelalgia and Raynaud's phenomenon". Journal of the American Academy of Dermatology 50 (3): 456–60. doi:10.1016/S0190-9622(03)02121-2. PMID 14988692.
- Priollet P (October 1998). "[Raynaud's phenomena: diagnostic and treatment study]". La Revue du praticien (in French) 48 (15): 1659–64. PMID 9814067.
- Kahan A, Weber S, Amor B, Saporta L, Hodara M, Degeorges M (April 1981). "Nifedipine and Raynaud's phenomenon". Annals of Internal Medicine 94 (4 pt 1): 546. PMID 7212523.
- Kahan A, Weber S, Amor B, Saporta L, Hodara M, Degeorges M (April 1982). "[Controlled study of nifedipine in the treatment of Raynaud's phenomenon]". Revue Du Rhumatisme et Des Maladies Ostéo-articulaires (in French) 49 (5): 337–43. PMID 6285445.
- Smith CR, Rodeheffer RJ (January 1985). "Raynaud's phenomenon: pathophysiologic features and treatment with calcium-channel blockers". The American Journal of Cardiology 55 (3): 154B–157B. doi:10.1016/0002-9149(85)90625-3. PMID 3881908.
- Landry, GJ; Edwards, JM, Porter, JM (1996). "Current management of Raynaud's syndrome". Advances in surgery 30: 333–47. PMID 8960343.
- Pancera P, Sansone S, Secchi S, Covi G, Lechi A (November 1997). "The effects of thromboxane A2 inhibition (picotamide) and angiotensin II receptor blockade (losartan) in primary Raynaud's phenomenon". Journal of Internal Medicine 242 (5): 373–6. doi:10.1046/j.1365-2796.1997.00219.x. PMID 9408065.
- Dziadzio M, Denton CP, Smith R et al. (December 1999). "Losartan therapy for Raynaud's phenomenon and scleroderma: clinical and biochemical findings in a fifteen-week, randomized, parallel-group, controlled trial". Arthritis and Rheumatism (Elsevier Saunergic blockers such as prazosin can be used to control Raynaud's vasospasms under supervision of a health care provider) 42 (12): 2646–55. doi:10.1002/1529-0131(199912)42:12-2646:AID-ANR21-3.0.CO;2-T. PMID 10616013.
- Waldo R (March 1979). "Prazosin relieves Raynaud's vasospasm". JAMA 241 (10): 1037. doi:10.1001/jama.241.10.1037. PMID 762741.
- Fries R, Shariat K, von Wilmowsky H, Böhm M (November 2005). "Sildenafil in the treatment of Raynaud's phenomenon resistant to vasodilatory therapy". Circulation 112 (19): 2980–5. doi:10.1161/CIRCULATIONAHA.104.523324 (inactive 2010-02-15). PMID 16275885.
- Wang WH, Lai CS, Chang KP et al. (October 2006). "Peripheral sympathectomy for Raynaud's phenomenon: a salvage procedure". The Kaohsiung Journal of Medical Sciences 22 (10): 491–9. doi:10.1016/S1607-551X(09)70343-2. PMID 17098681.
- Neumeister MW, Chambers CB, Herron MS et al. (July 2009). "Botox therapy for ischemic digits". Plastic and Reconstructive Surgery 124 (1): 191–201. doi:10.1097/PRS.0b013e3181a80576. PMID 19568080.
- Van Beek AL, Lim PK, Gear AJ, Pritzker MR (January 2007). "Management of vasospastic disorders with botulinum toxin A". Plastic and Reconstructive Surgery 119 (1): 217–26. doi:10.1097/01.prs.0000244860.00674.57. PMID 17255677.
- Muir AH, Robb R, McLaren M, Daly F, Belch JJ (2002). "The use of Ginkgo biloba in Raynaud's disease: a double-blind placebo-controlled trial". Vascular Medicine 7 (4): 265–7. doi:10.1191/1358863x02vm455oa. PMID 12710841.
- Tucker AT, Pearson RM, Cooke ED, Benjamin N (November 1999). "Effect of nitric-oxide-generating system on microcirculatory blood flow in skin of patients with severe Raynaud's syndrome: a randomised trial". Lancet 354 (9191): 1670–5. doi:10.1016/S0140-6736(99)04095-7. PMID 10568568.
- Karavidas MK, Tsai PS, Yucha C, McGrady A, Lehrer PM (September 2006). "Thermal biofeedback for primary Raynaud's phenomenon: a review of the literature". Applied Psychophysiology and Biofeedback 31 (3): 203–16. doi:10.1007/s10484-006-9018-2. PMID 17016765.
- DiGiacomo RA, Kremer JM, Shah DM (February 1989). "Fish-oil dietary supplementation in patients with Raynaud's phenomenon: a double-blind, controlled, prospective study". The American Journal of Medicine 86 (2): 158–64. doi:10.1016/0002-9343(89)90261-1. PMID 2536517.
Further reading 
- Bakst R, Merola JF, Franks AG, Sanchez M (October 2008). "Raynaud's phenomenon: pathogenesis and management". Journal of the American Academy of Dermatology 59 (4): 633–53. doi:10.1016/j.jaad.2008.06.004. PMID 18656283.
|Wikimedia Commons has media related to: Raynaud's phenomenon|
- Overview at National Institutes of Health
- Overview at Medical College of Wisconsin
- Raynaud's Disease at healthatoz.com
- Raynaud's Phenomenon on YouTube
- Raynaud's Disease on YouTube
- What Is Raynaud's Disease at National Heart, Lung, and Blood Institute
- Testimonial of cure for Raynaud's phenomenon
- Raynaud's Disease at Mayo Clinic
- Raynaud's & Scleroderma Association, a national charity and self-help organisation, committed to supporting patients and carers who have these conditions