Quick Answer: The main chilblains on feet causes are cold, damp weather followed by sudden rewarming — like stepping into a hot shower after a cold walk. The small blood vessels under your skin react badly to the temperature swing, leaving red, itchy, swollen patches that usually take a couple of weeks to settle. They’re painful, but for most healthy people they’re not dangerous.
See a doctor promptly if:
- The skin blisters, cracks open, or oozes fluid
- A sore doesn’t heal within two to three weeks
- You notice signs of infection — spreading redness, warmth, swelling, or fever
- You have diabetes, poor circulation, or an immune condition
- The patches come back every winter and keep getting worse
What Are Chilblains?
Chilblains are small, itchy, red or purple patches that show up on your toes, heels, or the sides of your feet after exposure to cold. They can feel like a burning itch one minute and a dull ache the next, and they often swell just enough to make your shoes feel tight. You might notice them a few hours after coming in from the cold, or not until the next day. Knowing the chilblains on feet causes helps you avoid the triggers that set them off.
They’re sometimes called pernio. If your toes have ever turned an angry red-purple after a winter walk and itched maddeningly for days, you’ve probably had chilblains. They’re not frostbite — frostbite is actual freezing of the tissue and far more serious — but the two get confused a lot, and chilblains happen at temperatures well above freezing, especially when it’s cold and damp.
Why Do Chilblains Happen?
When your feet get cold, the tiny blood vessels near the surface tighten up to keep your core warm. The trouble starts when you warm up too fast: the larger vessels reopen quickly, but the smaller ones lag behind, and blood can leak into the surrounding tissue, causing the redness, swelling, and itch.
So the classic trigger isn’t just cold — it’s cold followed by sudden heat. Think of coming in from a freezing walk and immediately standing on a hot radiator, or jumping straight into a hot bath. That rapid rewarming is when the damage is done. Dampness makes it worse, because wet skin loses heat faster than dry skin, and wind chill plays a role too — which is why chilblains are common in damp, windy climates rather than in dry, bitter cold.
Some people are simply more prone to them: podiatrists note that people with Raynaud’s phenomenon, lupus, or other conditions affecting circulation are more likely to develop chilblains, and smoking narrows blood vessels and raises the risk. Tight shoes that squeeze your toes can also make things worse.
What Chilblains Look and Feel Like
You’ll usually spot chilblains on your smallest toes first, though they can appear on your heels or the tops of your feet too. They start as red or purple patches that feel itchy, tender, or hot, and sometimes they swell into small bumps. The itching tends to flare up when your feet warm up, which is exactly when you’re trying to relax.
Most chilblains fade on their own within one to three weeks. But they can leave your feet feeling sensitive for a while, and the patches can come back in the same spots each winter. If the skin breaks, there’s a risk of infection, so cracked or weeping chilblains need attention.
What Helps
The most important thing is to avoid sudden temperature swings. When you come in from the cold, let your feet warm up slowly at room temperature — don’t plunge them into hot water or park them next to a heater. Give them fifteen or twenty minutes to adjust before you reach for the hot water bottle.
Keep your feet warm and dry while you’re out: socks that wick moisture away, and shoes that keep the rain out. The American Podiatric Medical Association notes that proper footwear matters a great deal for cold-weather foot health, and well-fitting shoes that don’t pinch your toes help keep blood flowing. Some podiatrists recommend merino wool socks for winter walks, since they stay warm even when damp.
For the itching and soreness, a plain, fragrance-free moisturiser can help dry skin — but not on broken skin. Over-the-counter corticosteroid creams may ease the itch and inflammation, but check with a pharmacist or your doctor first. Avoid scratching, tempting as it is — broken skin invites infection.
Gentle movement helps too — wiggling your toes and walking around when you come inside encourages blood flow. A warm (not hot) foot soak can soothe the ache, as long as you dry your feet thoroughly afterwards. Don’t rub the area vigorously: that can damage already-irritated skin.
A Simple Winter Routine for Your Feet
If chilblains recur for you, a small daily routine can make a real difference. Before you head out, put on clean, dry socks — wool or a moisture-wicking synthetic — and make sure your shoes fit with room for your toes to move. Foot powder can help if your feet sweat a lot.
While you’re out, keep moving — standing still in the cold is the worst scenario for your feet, since your circulation slows when you’re not moving. Take a short walk indoors every hour or so during a long cold day.
When you come back inside, resist the urge to warm up fast — sit somewhere comfortable, let your feet adjust, and change into dry socks. Check your toes each evening: catching a chilblain early, before the skin breaks, is much easier than dealing with a sore that won’t heal. If the same spots flare up year after year, talk to your doctor about checking your circulation.
FAQs
How long do chilblains on feet last?
Most clear up on their own within one to three weeks. If a patch hasn’t improved after three weeks, see a doctor.
Are chilblains dangerous?
For most healthy people they’re uncomfortable but not dangerous. They become a concern if the skin breaks, an infection sets in, or you have diabetes or circulation problems — in those cases, get medical advice promptly.
Can you get chilblains indoors?
Yes. If your home is cold and damp, or you sit with your feet on a cold floor for hours, chilblains can develop without you ever stepping outside.
Do chilblains mean I have poor circulation?
Not necessarily — plenty of people with healthy circulation get chilblains. But if they recur often or heal very slowly, have your circulation checked, especially if you also have symptoms like cold hands or numbness.
Should I use a hot water bottle on chilblains?
No — sudden heat is one of the main triggers. Warm your feet up slowly at room temperature instead, and keep a hot water bottle at a distance so the warmth reaches your feet gradually.
Sources
- Mayo Clinic — Chilblains: Symptoms and Causes
- Cleveland Clinic — Chilblains
- American Podiatric Medical Association (APMA)
- NHS — Chilblains
This article is for general information only and is not medical advice. Talk to your doctor or a podiatrist about your own feet.