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Raynaud Phenomenon
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Blood Heart Circulation

Raynaud Phenomenon

Raynaud phenomenon is a condition where blood vessels, typically in the fingers and toes, narrow in response to cold or stress, leading to decreased blood flow, numbness, and color changes. Management often involves avoiding triggers and, for the more serious secondary type, treating the underlying cause.

What is Raynaud Phenomenon?

Raynaud phenomenon is a condition that affects your blood vessels (the tubes that your blood flows through). It causes your blood vessels to narrow, which decreases blood flow. This is called a Raynaud episode or "attack." The attacks usually affect your fingers and toes, causing them to become cold and numb. They may also change color, usually to white or blue. These attacks happen in response to cold temperatures or stress.

Raynaud phenomenon may also be called Raynaud disease or Raynaud syndrome.

Types of Raynaud Phenomenon

There are two types of Raynaud phenomenon:

  • Primary Raynaud phenomenon is the more common type. Its cause is unknown.
  • Secondary Raynaud phenomenon is usually caused by another disease or problem, such as lupus or scleroderma. Other causes may be exposure to cold or certain chemicals. This type can be more serious than the primary type.

Causes of Raynaud Phenomenon

Researchers don't know exactly why some people develop Raynaud phenomenon. But they do understand how the attacks happen. When you are exposed to cold, your body tries to slow the loss of heat and maintain its temperature. To do this, the blood vessels in the top layer of your skin constrict (narrow). This moves blood from those vessels near the surface to vessels deeper in the body. But when you have Raynaud phenomenon, the blood vessels in your hands and feet react to cold or stress by narrowing quickly. They also stay narrowed for a long time.

Risk Factors for Raynaud Phenomenon

Anyone can develop Raynaud phenomenon, but some people are more likely to develop it:

  • Primary Raynaud phenomenon has been linked to:
    • Your sex. Women get it more often than men.
    • Your age. It usually develops in people younger than age 30. It often starts in the teenage years.
    • A family history of Raynaud phenomenon. You are more likely to develop Raynaud phenomenon if you have a family member who has it.
  • Secondary Raynaud phenomenon has been linked to:
    • Certain diseases. These include lupus, scleroderma, rheumatoid arthritis (RA), carpal tunnel syndrome, and connective tissue disorders.
    • Certain medicines. Medicines that treat high blood pressure, migraines, and attention deficit hyperactivity disorder (ADHD) may cause similar symptoms to Raynaud phenomenon or make your symptoms worse.
    • Work-related exposures, such as repeated use of vibrating machinery (such as a jackhammer), or exposure to cold or certain chemicals.

Symptoms of Raynaud Phenomenon

Raynaud attacks most often happen when you get cold, for example when you grab something cold from the freezer or go into an air-conditioned building on a warm day. Attacks usually affect your fingers and toes. But sometimes they can affect other parts of your body, such as your ears, nose, lips, or nipples.

An attack causes the skin to become cold and numb. Your skin may also turn white or blue due to a lack of oxygen. As the blood flow returns, your skin may tingle, throb, or turn red. An attack may last a few minutes or a few hours. If you have darker skin, you may not be able to easily see the skin color changes.

For many people, especially those with the primary type, the symptoms are mild. People with the secondary type often have more severe symptoms. They may develop skin ulcers (open sores caused by poor blood flow) or skin infections.

Diagnosis of Raynaud Phenomenon

There is no specific test to diagnose Raynaud phenomenon. To find out if you have it, your health care provider:

  • Will take your medical history and ask about your symptoms.
  • Will do a physical exam.
  • May order blood and other lab tests to check for other conditions which could be causing your symptoms and/or to help decide which type of Raynaud phenomenon you have.

Treatment and Management

Most people with Raynaud phenomenon can keep their symptoms under control by avoiding getting cold. But if this is not enough, medicines and, in some cases, surgical procedures can help.

Secondary Raynaud phenomenon is more likely to be serious and to need more treatments. It's also important to treat the condition or problem that is causing your Raynaud phenomenon.

You may need to see a specialist such as a rheumatologist, a doctor who treats diseases of the joints, muscles, and bones.

Prevention of Raynaud Phenomenon Attacks

Raynaud phenomenon cannot be prevented, but you can help prevent attacks and manage your symptoms by:

  • Placing your hands or feet in a warm place when you have an attack. This could mean putting them under warm (not hot) water or under a heating pad.
  • Keeping your body, especially your hands and feet, warm in cold weather.
  • Avoiding triggers, such as certain medicines and stress.
  • Quitting smoking (or not starting smoking).
  • Managing stress.

Frequently Asked Questions

The most effective way to prevent a Raynaud's attack is to avoid triggers like cold temperatures and stress. This includes wearing warm clothing, especially gloves or mittens, socks, and a hat, even indoors if you're prone to attacks. Avoid touching cold objects directly, use insulated drink holders, and warm up your car before driving in cold weather. Managing stress through relaxation techniques can also help. Quitting smoking and avoiding certain medications that constrict blood vessels (like some decongestants or beta-blockers) can also be beneficial.
You cannot definitively tell on your own if your Raynaud phenomenon is primary or secondary; a doctor's evaluation is needed. Primary Raynaud phenomenon is more common, usually milder, and not linked to an underlying disease. Secondary Raynaud phenomenon is often more severe and is caused by another medical condition, such as lupus, scleroderma, or rheumatoid arthritis. The distinction is important because secondary Raynaud's may require treatment for the underlying disease to manage symptoms and prevent complications like skin sores or tissue damage.
You should see a doctor if your Raynaud's attacks are frequent, severe, painful, affect only one side of your body, or if you develop sores or infections on your fingers or toes. It's also important to see a doctor if you suspect secondary Raynaud's due to other symptoms of an autoimmune disease. Your doctor will typically perform a physical exam, review your medical history,
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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