Chilblains on the Toes: Causes, Treatment & Prevention
Chilblains (medically perniosis) are small, itchy or painful red-purple swellings that appear on the toes a few hours after cold exposure. They are an abnormal reaction of the skin's tiny blood vessels to cold followed by rewarming — uncomfortable but, unlike frostbite, not a freezing injury. Most clear on their own within one to three weeks, and the key to both treatment and prevention is keeping the feet warm and rewarming them slowly, not quickly.
What chilblains are
Chilblains form when the small blood vessels under the skin react abnormally to cold. The NHS explains that they are caused by the skin's reaction to cold temperatures: when cold skin is warmed up too quickly, the tiny vessels near the surface cannot cope with the sudden change. Blood leaks into the surrounding tissue, producing inflammation and the characteristic itchy, swollen, red-purple patches. They typically appear on the toes — the body's coldest extremities — but can also affect the heels, fingers, ears and nose.
The trigger is not extreme cold but cold combined with damp followed by rewarming, which is why chilblains are common in cool, damp climates and in poorly heated homes. They tend to come on in autumn and winter and can recur each year.
Not frostbite, and not Raynaud's
It helps to know what chilblains are not. They are frequently confused with two other cold-related problems:
- Frostbite is the actual freezing of skin and deeper tissue. It is a medical emergency and can cause permanent tissue damage. Chilblains are a non-freezing reaction and do not destroy tissue in that way.
- Raynaud's phenomenon causes the fingers or toes to turn white, then blue, then red in response to cold or stress, as blood vessels temporarily clamp shut. Some people with Raynaud's are more prone to chilblains, but the two are distinct.
Distinguishing them matters because the urgency differs: frostbite needs emergency care, whereas chilblains are usually managed at home.
Symptoms and who is at risk
Chilblains usually appear a few hours after cold exposure. Typical features include:
- Small, itchy or burning red or purple patches on the toes
- Swelling and tenderness of the affected skin
- A worsening of the itching or burning when you move into a warm room
- In more severe cases, blisters or breaks in the skin that can become infected
Some people are more prone than others. According to the Mayo Clinic, risk is higher in those living in cold, damp climates, people with poor circulation, those with a low body weight, and people with certain connective-tissue conditions. There is a recognised association with lupus and other autoimmune disease, so chilblains that are unusually severe, occur outside cold weather, or do not settle warrant a check for an underlying condition. Women and older adults also tend to be affected more often.
Self-care at home
Most chilblains get better on their own. The goal of self-care is to keep the feet warm and let the skin recover without making things worse.
- Warm up gradually, not quickly. Bring cold feet back to temperature slowly at room temperature. Avoid direct heat such as a radiator, hot water bottle, fire or very hot bath — rapid rewarming is what triggers the reaction.
- Keep your feet warm and dry. Change out of damp socks promptly and keep the whole home reasonably warm.
- Do not scratch. Scratching breaks the skin and can lead to infection; soothing the itch with a moisturiser or a soothing lotion is safer.
- Moisturise. Applying an unperfumed moisturiser helps protect the skin barrier and ease itching.
- Keep moving. Gentle activity helps circulation to the feet.
Treatments a doctor may use, and when to seek help
If chilblains are severe, recurrent or not improving, a clinician can help. Depending on the case they may prescribe a topical steroid cream to ease inflammation and itching, treat any skin infection, or — for people with frequent winter chilblains — consider a medication that relaxes blood vessels (such as a calcium-channel blocker) to improve circulation. They will also look for any underlying condition if the pattern is unusual.
See a doctor if you have chilblains that:
- Blister, break the skin, or show signs of infection (increasing pain, pus, spreading redness, warmth or fever)
- Do not improve after one to three weeks of self-care
- Keep coming back each winter or appear when it is not especially cold
- Occur alongside symptoms that suggest an underlying condition such as lupus or a circulation problem
For guidance on which foot problems need professional attention, see when to see a podiatrist.
How to prevent chilblains
Prevention is far easier than treatment, and it centres on keeping warm and avoiding sudden temperature swings:
- Layer warm socks — choose wool or thermal socks and avoid tight footwear that restricts circulation. Compression and warm-sock options can help some people.
- Keep your whole body warm, not just your feet — a warm core helps keep blood flowing to the extremities.
- Rewarm gradually whenever you come in from the cold; never use direct heat on cold feet.
- Keep feet dry and change out of damp shoes and socks quickly.
- Stop smoking — nicotine narrows blood vessels and worsens circulation to the toes.
- Stay active to keep circulation healthy through the cold months.
If your feet are persistently cold or numb beyond the occasional chilblain, it is worth understanding why — see our guides on cold feet causes and numb feet causes.
Frequently asked questions
- How long do chilblains last?
- Most chilblains clear up on their own within one to three weeks, especially once you keep the feet warm and avoid further cold exposure. They can recur each winter, and in some people they keep coming back through the cold season. Chilblains that blister, break the skin, last longer than a few weeks, or keep recurring should be reviewed by a doctor.
- Should you rub or warm chilblains quickly?
- No. Do not rub, scratch or warm chilblains rapidly with direct heat such as a radiator, hot water bottle or fire. Fast rewarming and friction make the small blood vessels react more and can worsen the damage, and scratching can break the skin and invite infection. Warm the feet gradually at room temperature and resist the urge to scratch.
- Are chilblains the same as frostbite?
- No. Chilblains are an abnormal but non-freezing reaction of small blood vessels to cold followed by rewarming, and although uncomfortable they do not cause the tissue death seen in frostbite. Frostbite is actual freezing of the skin and deeper tissue and is a medical emergency. Chilblains are also different from Raynaud's, where fingers or toes turn white then blue with cold.
Sources & further reading
- Chilblains overview and self-care, NHS
- Chilblains, symptoms and causes, Mayo Clinic
- Foot health and skin conditions, American Podiatric Medical Association (APMA)