Raynaud: Symptoms, Triggers, Treatment & Prevention

This overview of Raynaud phenomenon covers the symptoms, triggers, treatment, and prevention of blood-flow attacks called Raynaud attacks.

During these attacks, small blood vessels narrow too strongly and reduce blood flow to the skin ^1,2. The fingers and toes are affected most often ¹.

Cold exposure and emotional stress are the main triggers ^1,5. Affected skin may become cold, numb, white, or blue during an attack ¹.

Blood flow later returns, which may cause redness, tingling, burning, or throbbing ^1,5. Attacks may last from several minutes to several hours ^1,3.

Most cases are mild and respond to practical steps that limit cold exposure ^1,3. However, severe symptoms can signal an underlying illness or blood vessel problem ^5,8.

This guide explains symptoms, causes, diagnosis, treatment, and ways to prevent attacks. It also covers warning signs that need medical care.

Raynaud is an abnormal blood vessel response to cold temperatures or emotional stress. Small arteries and skin vessels tighten, which is called vasoconstriction.

The body normally limits skin blood flow in cold conditions to protect its core temperature ^1,2. With Raynaud, vessels narrow quickly and remain narrow longer than expected ¹.

This temporary spasm limits oxygen-rich blood reaching the affected skin ⁵. The reduced flow causes coldness, numbness, and visible color changes ^1,5.

When the vessels relax, blood enters the area again ⁵. The returning blood may make the skin red, warm, swollen, or painful ^5,8.

Primary Raynaud occurs without another known disease or health problem ^1,5. It is the more common type and is often mild ^1,8.

Some people with primary Raynaud do not need medical treatment. Keeping warm may provide enough symptom control ^1,3.

Secondary Raynaud develops with another disease, medicine, injury, or environmental exposure ^5,10. It is less common but tends to cause more serious problems ^5,8.

Damage to blood vessels can occur with secondary Raynaud ⁵. Severe attacks may then lead to painful sores or tissue injury ^4,5.

Primary Raynaud commonly starts during the teenage years or before age 30 ^1,10. Raynaud phenomenon affects women more often than men ^1,8.

A family history also raises the chance of developing primary Raynaud ^1,8. Living in a colder climate is another linked risk factor.

Secondary Raynaud can begin at any age ⁶. Symptoms starting later in adulthood raise concern about an underlying connective tissue disorder.

Raynaud attack symptoms can vary between people and between separate attacks ⁵. An episode may affect one digit first and then spread to others ⁵.

Affected skin often turns pale or white when blood flow falls ⁵. A clear border may appear between pale and normal-colored skin.

The skin may then become blue as oxygen levels fall within the affected tissue ⁵. When blood flow returns, the area may become red ⁵.

Not every attack follows all three color stages ¹⁰. Some attacks cause only one or two color changes ¹⁰.

Color changes may be harder to see on darker skin ^1,8. Coldness, numbness, pain, and differences from nearby skin may offer useful clues ^1,8.

Taking a photograph during an attack may capture skin color changes. A clinician may consider whether Raynaud’s is primary or secondary when planning treatment ¹⁰.

Reduced blood flow can make an affected area feel cold or numb ^1,10. Some people also notice pain during the low-flow stage ^3,6.

As circulation returns, the skin may tingle, burn, sting, or throb ^5,8. Swelling and warmth may also occur during this stage ^8,10.

Raynaud most often affects the fingers and toes ¹. It can also affect these less common areas:

An attack can last for a few minutes or several hours ^1,3. The length and intensity may differ with each episode ⁵.

Primary Raynaud symptoms are often mild ^1,5. Secondary Raynaud is more likely to cause pain, tingling, and skin damage ^1,6.

Poor blood flow can cause painful ulcers, which are open skin sores ^1,5. People with secondary Raynaud may develop skin ulcers or skin infections ¹.

Rarely, a long or severe loss of circulation causes gangrene, meaning tissue death ^4,5. Serious cases may require hospital treatment to restore blood flow and manage damaged tissue ⁴.

Cold is the most likely trigger for a Raynaud attack. Emotional stress can also cause the blood vessels to narrow ⁵.

An attack does not always require freezing outdoor weather. Small or sudden temperature changes may be enough ^3,5.

Common cold triggers include:

Emotional stress can release signals that make blood vessels narrow ⁵. Feeling startled may also provoke an attack.

Nicotine causes blood vessels to tighten ⁴. Smoking and some vaping products may therefore increase the chance of an attack ⁴.

Secondhand smoke can also tighten blood vessels and lower skin temperature. Avoiding tobacco smoke is an important part of prevention.

Some medicines can cause similar symptoms or make Raynaud worse ¹. Examples include certain medicines from these groups:

Do not stop a prescribed medicine on your own. Ask your clinician to review possible triggers and safer options.

Secondary Raynaud is linked with scleroderma, lupus, rheumatoid arthritis, and Sjögren disease ^2,5. These illnesses can damage vessels or change how they respond to cold ^2,5.

Carpal tunnel syndrome may increase the hand’s response to low temperatures. Frostbite can also damage nerves and lead to Raynaud symptoms ⁵.

Blood vessel disorders can cause secondary Raynaud ^6,8. These include atherosclerosis, which involves fatty deposits inside arteries.

Repeated use of vibrating tools can raise the risk of secondary Raynaud ^1,5. Examples include jackhammers and other vibrating machinery ^1,8.

Workplace cold and certain chemicals are also linked with secondary disease ^1,5. Vinyl chloride is one chemical associated with this form.

There is no single test that confirms every case of Raynaud ^1,4. Diagnosis usually starts with a symptom history and physical examination ^1,4.

A clinician may discuss medications that can bring on attacks with you ^2,4. Photographs may show the skin color changes that occur during an episode.

The medical history may cover these details:

Nailfold capillaroscopy examines tiny vessels near the base of a fingernail ⁴. A clinician uses a magnifier or microscope during this test ^4,7.

Enlarged or unusual vessels may point toward a connective tissue disease ¹⁰. The findings can help distinguish primary from secondary Raynaud ^4,7.

Blood tests may check for conditions linked with secondary Raynaud ^1,4. An antinuclear antibody test, called an ANA test, may show autoimmune activity.

Other tests may look for inflammation or artery disease. No blood test can diagnose Raynaud by itself.

Discussing medications with a doctor can provide clinical context because some medicines can bring on attacks ^4,7. A rheumatologist may help when an autoimmune disease is suspected ^1,4.

Contact a healthcare professional if symptoms are new, severe, or getting worse. Later-onset symptoms may have a stronger link with connective tissue disease.

Medical assessment is important in these situations:

These signs do not prove that secondary Raynaud is present. However, they warrant an evaluation for tissue damage or an underlying condition.

Treatment aims to reduce attacks, limit their severity, and prevent tissue damage ^4,7. Care also addresses the cause when Raynaud is secondary ^1,7.

Acting to stay warm may help prevent attacks and keep symptoms under control ⁴. If an attack starts, use these steps:

Avoid water that feels hot because the recommended approach uses warm water ^1,4. Numb skin may make it harder to judge temperature accurately.

Learning how to prevent Raynaud attacks starts with identifying personal triggers. A brief record of weather, activities, and stress may help guide discussions with your clinician.

Keeping the whole body warm is more effective than protecting only the hands ^3,4. Use these practical steps during cold conditions:

Try to avoid rapid moves between warm and cool places. Adjust indoor air conditioning when possible.

Stress control may reduce attacks triggered by strong emotions ^4,7. Deep breathing, meditation, movement, or mindfulness may help manage stress ^4,7.

Avoid smoking, vaping, and secondhand smoke because they tighten blood vessels ^4,7. A clinician can help create a plan for stopping tobacco use ⁴.

Review all medicines and supplements with your clinician. Do not change or stop prescription treatment without medical guidance.

If work involves cold, vibration, or chemicals, discuss ways to reduce exposure. Repeated vibration and certain workplace chemicals are linked with secondary Raynaud ^1,5.

Lifestyle changes control symptoms for many people ^4,5. Medicines may help when attacks remain frequent or severe.

Calcium channel blockers relax and open small blood vessels. Examples listed for Raynaud include nifedipine and amlodipine.

These medicines may reduce attack frequency or severity. They may also help heal sores on affected fingers or toes.

Other vasodilators may be considered when needed. A vasodilator is a medicine that relaxes and widens blood vessels.

Options listed for Raynaud include losartan, sildenafil, fluoxetine, and prostaglandins. The best choice depends on symptoms, causes, and other health conditions.

Secondary Raynaud treatment must also address the underlying condition ^1,6. Specialist care may be needed for autoimmune disease, damaged vessels, or severe sores ^1,4.

Severe tissue damage may require wound care and treatment for infection ⁴. Intravenous medicines may rapidly improve blood flow in serious cases ^4,6.

Sympathectomy is a procedure that blocks or cuts nerves that trigger vessel narrowing ^4,7. Clinicians reserve this approach for severe cases ^4,7.

Rarely, surgery may remove dead tissue when gangrene develops ⁴. Hospital care may be needed when circulation loss becomes this serious ^4,6.

Most people can reduce Raynaud attacks by staying warm and avoiding known triggers ^1,4. Loose layers, mittens, dry socks, and freezer gloves can limit cold exposure ^3,4.

Stress management may help when emotions trigger attacks ^4,7. Avoiding smoking and vaping also reduces exposure to nicotine, which narrows blood vessels ⁴.

If an attack occurs, move somewhere warm and gently warm the affected area ^4,7. Use warm water rather than hot water ^4,7.

If pain becomes severe or skin changes persist, contact a healthcare professional ^2,6. If a sore, infection, or blackened tissue appears, seek prompt medical evaluation ^6,8.

Symptoms beginning later in adulthood also deserve a clinical review. Testing may identify secondary Raynaud and guide treatment of its underlying cause ^1,4.