Raynaud's phenomenon explained

What Raynaud's is and how it feels

Raynaud's phenomenon happens when the tiny blood vessels supplying the fingers and toes narrow too much in response to cold or emotional stress, briefly reducing blood flow. During an attack, the affected fingers or toes often turn white as blood is cut off, then may go blue as oxygen is used up, and finally red and sometimes throbbing or tingling as blood rushes back. Not everyone gets all three colours. The area can feel cold, numb, and painful, and attacks typically last from minutes to under an hour. Other areas such as the ears, nose or lips can occasionally be affected. Between attacks, everything usually looks and feels normal, which is why Raynaud's is defined by these episodes rather than constant symptoms.

Primary Raynaud's: the common, harmless type

Most people with Raynaud's have the primary type, which occurs on its own without any underlying disease. It is very common, often starts in younger people, particularly women, and tends to run in families. In primary Raynaud's the attacks, while uncomfortable, do not cause lasting damage to the fingers and toes. It is essentially an exaggeration of the body's normal response to cold. Because it is harmless, primary Raynaud's usually needs no more than sensible self-care to keep warm and avoid triggers. Many people manage well for years without any medication. Reassurance that this is a common and benign condition is often the most important part of managing it, once more serious causes have been considered and ruled out.

Secondary Raynaud's: when it points to something else

Less commonly, Raynaud's is secondary, meaning it is linked to another underlying condition, most often one of the autoimmune diseases that affect connective tissue, such as scleroderma or lupus. Secondary Raynaud's tends to start later in life, can be more severe, and may affect the blood supply enough to cause skin sores or ulcers on the fingertips. Certain clues raise the suspicion of a secondary cause: starting after the age of about forty, attacks that are severe or affect the hands unevenly, ulcers or damage to the skin, or other symptoms such as joint pain, a rash, dry eyes and mouth or difficulty swallowing. When these features are present, a doctor will look for and manage the underlying condition, which is the priority.

Self-care that makes a difference

For most people, practical steps to stay warm and reduce triggers are the mainstay of managing Raynaud's. Keeping the whole body warm, not just the hands, helps, as does wearing gloves — including when taking things out of the freezer — warm socks, hats and layered clothing in the cold. Hand and foot warmers can be useful. Because emotional stress can trigger attacks, relaxation techniques and managing stress help some people. Stopping smoking is important, as smoking narrows blood vessels and worsens Raynaud's. Regular exercise supports healthy circulation. Some medicines, including certain cold and migraine remedies and beta-blockers, can trigger attacks, so it is worth reviewing these with a clinician. These simple measures are often enough to keep primary Raynaud's under control.

Treatment and when to see a doctor

If attacks are frequent, severe or interfering with daily life despite self-care, a doctor may prescribe medication that helps relax and widen the blood vessels to improve blood flow to the fingers and toes. It is worth seeing a GP if Raynaud's is new in an older adult, is severe or one-sided, comes with other symptoms such as joint pain or a rash, or if the skin breaks down into sores or ulcers, as these may signal a secondary cause needing investigation. Seek prompt medical advice if a finger or toe stays white, cold and painful and does not recover, or if an ulcer or infection develops, as these need timely treatment. For most people, though, Raynaud's is a manageable, long-term nuisance rather than a serious threat.