Raynaud's phenomenon

In Raynaud's, the tiny arteries supplying the fingers and toes are unusually sensitive and clamp down too readily, briefly cutting blood flow. Cold and emotional stress are the common triggers. Why this happens is not fully understood.

Most cases are primary, meaning they arise on their own with no underlying disease. This type often begins in the teens or twenties, is more common in women, and tends to run in families.

A smaller number are secondary, linked to an underlying condition such as systemic sclerosis, lupus or another connective tissue disease. Certain medicines and heavy vibrating-tool use can also contribute.

Raynaud's tends to follow a recognisable pattern. Features include:

• Fingers or toes that turn white, then blue, then red in response to cold or stress
• Numbness, tingling or pain in the affected areas during an episode
• Symptoms that settle as the area warms up and blood flow returns

Raynaud's most often occurs on its own and is not associated with any other condition. However, it is worth a specialist review if it begins later in life, is severe or only affects one side, causes skin damage, or comes alongside other symptoms such as joint pain, rashes or difficulty swallowing, as these can occasionally point to an underlying autoimmune condition.

Assessment includes your history, an examination and blood tests for particular antibodies, which help separate harmless Raynaud's from the less common situations that need further attention.

For most people, simple measures to keep warm and protect the hands and feet from cold are the mainstay, and these are often very effective. Where symptoms are troublesome despite these measures, a medicine to improve blood flow can help. The usual first choice is a calcium-channel blocker such as nifedipine, which is discussed with you; it can cause headache, flushing or ankle swelling, so the dose is built up gradually to a level you tolerate well. If an underlying condition is found, that is managed in its own right. The approach is tailored to you.

Keeping the whole body warm matters as much as warming the hands, since the circulation responds to your core temperature. Helpful habits include:

• Layering up before going outdoors and wearing gloves, warm socks and a hat
• Using hand or pocket warmers, and running hands under warm (not hot) water at the first sign of an attack
• Stopping smoking and limiting caffeine, both of which narrow small blood vessels
• Staying active and managing stress, as relaxation can reduce the frequency of episodes

For most people with the primary type, the outlook is good and symptoms stay stable or ease over time. Take any prescribed medicine as agreed, and mention new skin changes or other symptoms at review.

Most episodes settle harmlessly within minutes of warming up. Seek prompt medical advice if you notice any of the following, as they can signal poor blood supply or an underlying condition:

• Skin that breaks down, ulcerates or develops sores at the fingertips
• New symptoms alongside the colour changes, such as joint pain, rashes, dry eyes or mouth, or difficulty swallowing

If symptoms are simply troublesome or new, a routine specialist review is the right route rather than urgent care. A finger or toe that is acutely cold, intensely painful, or stays white, blue or numb and does not recover with warming should be treated as urgent.

While Raynaud's is usually harmless, a specialist review provides reassurance where it is uncomplicated, and identifies the small number of cases where it signals something that needs attention. If your Raynaud's is new, severe or accompanied by other symptoms, it is worth getting checked.

How is Raynaud's phenomenon diagnosed?

Raynaud's is usually recognised from your description of the colour changes in the fingers or toes, supported by an examination. To work out whether it is the harmless type or a clue to an underlying autoimmune condition, a specialist also considers your history and may arrange blood tests for particular antibodies. Close inspection of the small vessels at the nailfolds can add useful information, and assessment can often be done in a single visit.

Is Raynaud's serious, or is it usually harmless?

For most people Raynaud's is harmless and occurs on its own without any other condition. It becomes more worth checking when it starts later in life, is severe or one-sided, damages the skin, or comes alongside symptoms such as joint pain, rashes or difficulty swallowing. In that small group it can point to an underlying autoimmune condition, which is the main reason a specialist review can be reassuring.

Will Raynaud's go away, and can it be cured?

There is no single cure, but the symptoms are very manageable and many people find they improve with simple steps. Keeping warm and protecting the hands and feet from cold is the mainstay and is often very effective. Where symptoms remain troublesome, a medicine to improve blood flow can help, and if an underlying condition is found, treating that often settles the Raynaud's as well.

Do I need medication or surgery for Raynaud's?

Most people do not need either, as keeping warm and avoiding sudden cold is enough to control symptoms. If episodes are still troublesome, a medicine such as a calcium-channel blocker can be added and the dose built up gradually to a level you tolerate well. Surgery is rarely needed and is only considered in unusual, severe cases, so the approach is tailored to how much the symptoms affect you.