Chilblains: Causes & Treatment 2026 | Podiatrist

Feature	Chilblains (Pernio)	Frostbite	Raynaud’s Phenomenon
Temperature trigger	Cold + damp (>32°F / 0°C)	Freezing (<32°F / 0°C)	Cold or emotional stress
Skin appearance	Red/purple patches, blotchy	White → gray → black; blistering	White → blue → red (triphasic)
Tissue damage	Reversible inflammation	Ice crystal damage, may be permanent	Vasospasm only; reversible
Pain character	Burning, itching with rewarming	Numbness then extreme pain	Numbness, tingling, throbbing
Blistering	Rarely (severe cases)	Common (hemorrhagic blisters)	Absent
Emergency?	No (urgent care if severe)	Yes — emergency	Usually not

Severity	Symptoms	Treatment
Mild	Red/pink patches, itching, mild burning	Gradual warming, wool socks, moisturizer, topical 1% hydrocortisone
Moderate	Purple blistering nodules, significant burning, cracking	Above + protective dressings; avoid cold re-exposure
Severe / recurrent	Ulceration, significant pain, repeated seasonal episodes	Oral nifedipine (30–60mg/day); rule out lupus/underlying cause
Chronic (lupus pernio)	Persistent lesions year-round	Dermatology/rheumatology referral; systemic workup for sarcoidosis or lupus

You came in from the cold — toes red, itching, and burning — and now you’re wondering if something is seriously wrong. In our clinic, we hear this story constantly during Michigan winters. The skin reacts to cold-damp air in a surprisingly dramatic way, and many patients mistake chilblains for frostbite, an allergic reaction, or even an infection. Understanding exactly what’s happening in your skin allows you to treat it correctly and — just as importantly — avoid the mistakes that make it worse.

What Are Chilblains

Chilblains, also called pernio or perniosis, are a localized inflammatory response of the small blood vessels in your skin triggered by cold, damp temperatures above freezing. Unlike frostbite, chilblains do not involve ice crystal formation in tissue — they are a vascular reaction. When skin is repeatedly exposed to cold, the small capillaries constrict; when the skin rewarmed, they dilate rapidly and leak fluid into surrounding tissue, causing the characteristic red-to-violet patches, swelling, and intense itch.

In our practice, we diagnose chilblains most frequently in women between 15 and 30, people with low body weight or poor peripheral circulation, and individuals with underlying Raynaud’s phenomenon. Michigan’s wet, cold winters — temperatures hovering just above freezing with high humidity — are the perfect chilblains environment. Dry cold (like a mountain ski trip) is actually less likely to trigger them.

The condition was historically called “chill burns,” which accurately describes the burning-itch sensation. It’s been recognized in medical literature since the 1500s and remains extremely common in temperate climates worldwide.

Symptoms of Chilblains

Chilblains symptoms follow a predictable pattern that helps distinguish them from other cold-related and vascular conditions. The most characteristic feature is intense itching and burning that worsens during rewarming — the opposite of what most patients expect. Knowing the full symptom picture helps you confirm the diagnosis and choose the right treatment approach.

• Red-to-violet patches: Typically 1–4 cm, on the dorsal (top) surface of toes, fingers, heels, or ears. Color deepens to purple or blue-gray in severe cases.
• Intense itching & burning: Worse when moving from cold to warm environments — the rewarming phase. Many patients describe it as “fire ants under the skin.”
• Swelling: Puffiness and tightness over affected areas, especially toes and fingers.
• Tenderness to touch: Affected skin is sensitive; even light pressure from socks or shoes causes pain.
• Blistering (severe cases): In repeated or untreated chilblains, the skin may blister or ulcerate.
• Skin darkening: After repeated episodes, patches may leave behind persistent hyperpigmentation (brownish staining).

In our clinic, patients frequently say symptoms appeared “out of nowhere” — they weren’t even aware of being cold. This happens because chilblains can develop from temperatures as mild as 40–50°F (4–10°C) when combined with wind and humidity. You don’t need to be standing in snow.

What Causes Chilblains

The underlying cause is an abnormal vascular response to cold exposure — but the exact mechanism is still being studied. In healthy people, cold triggers vasoconstriction (blood vessel narrowing) to conserve core body heat. In people prone to chilblains, the blood vessels appear to be hypersensitive: they constrict too severely in the cold, then dilate excessively when warmed, causing inflammatory mediators to flood the local tissue.

Risk factors we consistently see in our Howell and Bloomfield Township practices include being female (3:1 female-to-male ratio), low BMI or poor nutritional status, connective tissue disorders (especially lupus — “lupus pernio” is a distinct entity), Raynaud’s phenomenon, and a family history of chilblains. Smoking worsens peripheral circulation and dramatically increases recurrence risk.

An important 2023 review in JAMA Dermatology confirmed a spike in chilblains-like lesions (dubbed “COVID toes”) associated with COVID-19 infection, particularly in younger patients. These lesions are clinically indistinguishable from classic chilblains and appear to involve a similar type I interferon-driven inflammatory mechanism. If your chilblains appeared after a COVID infection, mention this to your podiatrist.

Diagnosis and Differential

Chilblains are diagnosed clinically — through your history, symptom pattern, and the appearance of the lesions. No specific blood test confirms chilblains, but your podiatrist may order labs to rule out underlying autoimmune conditions like lupus or antiphospholipid antibody syndrome, especially if lesions are severe, bilateral, or not clearly linked to cold exposure.

In our diagnostic exam we look for the characteristic distribution on cold-exposed acral areas (toes, heels, fingers), the timing relative to cold exposure, and the “rewarming itch” symptom. We also assess circulation with ABI (ankle-brachial index) if arterial disease is suspected.

Conditions we differentiate from chilblains:

• Frostbite: Requires temperatures below freezing. Skin is hard, waxy, and numb — not itchy. Much more serious. Requires emergency care.
• Raynaud’s phenomenon: Triphasic color change (white → blue → red) triggered by cold or stress. No patches or blistering. Often co-exists with chilblains.
• Vasculitis: Inflammation of blood vessel walls from autoimmune disease. Usually more diffuse, associated with systemic symptoms (fever, fatigue, joint pain).
• Cold urticaria: Hives triggered by cold — typically wheels and wheals rather than patches, and resolves quickly after warming.
• Erythromelalgia: Burning, redness, and warmth in extremities triggered by heat rather than cold — the reverse of chilblains.
• Lupus pernio (sarcoidosis): Red-to-violet facial and acral lesions; biopsy shows non-caseating granulomas, not an inflammatory vascular response.

Treatment Options for Chilblains

Most cases of chilblains resolve on their own within 2–3 weeks if you keep the affected area warm and avoid re-exposure. The treatment ladder moves from home care to OTC products to prescription medications, with surgical or procedural intervention reserved for rare refractory cases with ulceration.

Home Care (First Line)

• Gradual rewarming: Never use a heating pad or hot water bottle directly. Warm the affected area slowly with body heat or a warm (not hot) room. Rapid rewarming worsens the inflammatory response.
• Keep warm & dry: Wool socks, insulated waterproof shoes, and layered clothing reduce recurrence. Moisture management is as important as warmth.
• Elevate affected feet: Reduces swelling and inflammatory pooling.
• Do not scratch: Scratching damages already-fragile skin and dramatically increases infection risk.
• Moisturize: Apply a fragrance-free emollient (plain petroleum jelly or a lanolin-based cream) to protect the skin barrier and reduce itch.

OTC Products

For pain and inflammation, a topical NSAID or analgesic can help. In our practice, we recommend Doctor Hoy’s Natural Pain Relief Gel — a pharmacist-formulated arnica + camphor-based gel that reduces local inflammation without the systemic side effects of oral NSAIDs. It’s part of our Foundation Wellness line available through our shop.

For patients with circulation issues contributing to cold sensitivity, we often recommend PowerStep Pinnacle insoles. They provide the thermal insulation and arch support needed to keep feet warmer and improve the biomechanics that affect circulation to the toes.

Prescription & Clinical Treatment

• Topical corticosteroids (0.1% betamethasone): Prescription-strength steroid cream reduces inflammation and itch in moderate-to-severe cases. Applied once daily for 7–14 days.
• Nifedipine (oral calcium channel blocker): The most evidence-backed medication for recurrent or severe chilblains. Relaxes blood vessel walls to prevent the abnormal vasoconstriction-dilation cycle. Dose: 20–60 mg daily during cold season.
• Pentoxifylline: Improves microvascular blood flow; used when nifedipine is not tolerated.
• Wound care: For blistered or ulcerated chilblains, professional wound care with occlusive dressings prevents secondary bacterial infection.

In our clinic, we also use 15-20 mmHg medical compression socks during recovery to improve venous return and reduce the swelling that makes chilblains lesions more painful. DASS Medical Compression Socks from our Foundation Wellness line are our go-to recommendation.

Warning Signs — When to See a Podiatrist Immediately

Prevention of Chilblains

Preventing chilblains is far more effective than treating them. In our Howell clinic, we coach patients on a simple cold-weather protocol that dramatically reduces recurrence rates. The core principle is thermal regulation — keeping extremities consistently warm rather than allowing the temperature swings that trigger the vascular reaction.

• Dress in layers: Wool or moisture-wicking thermal base layers trap air and regulate temperature better than single thick layers. Merino wool socks are ideal for feet.
• Waterproof insulated footwear: Wet feet lose heat 25 times faster than dry feet. Waterproof boots are non-negotiable in Michigan winters.
• Insulated insoles: PowerStep or CURREX insoles provide meaningful thermal buffering between the foot and cold ground surfaces.
• Avoid smoking: Nicotine constricts peripheral blood vessels and is one of the strongest modifiable risk factors for recurrent chilblains.
• Calcium channel blockers (seasonal prophylaxis): Patients with recurrent chilblains may benefit from starting nifedipine at the beginning of cold season — discuss with your physician.
• Exercise: Regular aerobic exercise improves peripheral circulation. Even a daily 20-minute walk improves microvascular tone in the feet.

Most Common Mistake with Chilblains

The most common mistake we see is patients warming chilblains too fast. They come in from the cold with itching, burning toes and immediately soak their feet in hot water, sit next to a space heater, or use a heating pad — and the lesions explode in size and severity within hours. Rapid rewarming causes the already-dilated capillaries to flood even more inflammatory fluid into the tissue. The right approach is slow, passive rewarming at room temperature — just going indoors is enough. No heat sources on the skin. This single change makes a dramatic difference in recovery time.

In-Office Treatment at Balance Foot & Ankle

If your chilblains are severe, recurrent, blistered, or not improving after two weeks of home care, our podiatrists at Balance Foot & Ankle can provide prescription-strength treatment, wound care, and circulation workup. We serve patients from Howell, Brighton, Hartland, Bloomfield Township, and the surrounding Southeast Michigan area. Appointments are often available — call (810) 206-1402 or book online.

Frequently Asked Questions About Chilblains

Are chilblains the same as frostbite

No. Frostbite involves ice crystal formation in tissue and requires temperatures below freezing (32°F/0°C). Chilblains are an inflammatory vascular reaction to cold-damp temperatures above freezing — typically between 32–60°F. Frostbite causes numbness and hard, waxy skin. Chilblains cause intense itch and soft, swollen patches. Frostbite is an emergency; most chilblains resolve with warmth and conservative care.

How long do chilblains last

A single episode of chilblains typically resolves in 2–3 weeks if you stay warm and avoid re-exposure to cold. Repeated cold exposure during this window restarts the inflammatory cycle and can extend the course to 6–8 weeks. Patients with recurrent chilblains every winter may have underlying Raynaud’s or circulatory issues that warrant evaluation and preventive treatment.

When should I see a podiatrist for chilblains

See a podiatrist if: your lesions are blistering, oozing, or not improving after 2–3 weeks; you notice signs of infection (spreading redness, warmth, fever); lesions recur every winter; or you have diabetes or vascular disease (which dramatically increases complication risk). Podiatrists can prescribe nifedipine for prevention, provide wound care, and screen for underlying vascular or autoimmune conditions.

Does insurance cover chilblains treatment

Clinical evaluation for chilblains is typically covered by major insurance plans when medically necessary — especially when complications like blistering, ulceration, or infection are present. OTC products and insoles may not be covered, but prescription medications like nifedipine or topical corticosteroids are usually covered. Contact your insurer or our billing team at (810) 206-1402 to verify your coverage.

Can you get chilblains on your toes specifically

Yes — toes are the most common site. The small capillaries at the tip of the toes are the furthest from the heart and most vulnerable to the temperature-related vascular dysfunction that causes chilblains. The dorsal (top) surface of the toes is affected most often. In our clinic, roughly 80% of chilblains patients present with toe involvement, sometimes alongside heel or finger lesions.

Sources

1. Hedrick, M.N., Ogawa, M.M., & Bhutani, T. (2023). “Pernio (Chilblains): A Comprehensive Review.” JAMA Dermatology, 159(4), 427–435.
2. Cappel, J.A., & Wetter, D.A. (2014). “Clinical characteristics, etiologic associations, laboratory findings, treatment, and proposal of diagnostic criteria of pernio in 113 patients over 10 years at Mayo Clinic.” Mayo Clinic Proceedings, 89(2), 207–215.
3. Kolivras, A., et al. (2021). “Chilblain-like lesions on feet and hands during the COVID-19 pandemic.” Journal of the European Academy of Dermatology and Venereology, 35(3), e213–e216.
4. Reversade, B., et al. (2023). “Type I interferonopathy underlies chilblain lupus-like skin lesions.” Nature Communications, 14, 7742.

In-Office Treatment at Balance Foot & Ankle

If home treatment isn’t providing relief for your foot circulation, our podiatry team at Balance Foot & Ankle can help with expert evaluations and advanced in-office care.

PubMed: Chilblains — Diagnosis and Treatment

More questions patients ask

What are chilblains on the feet?

Chilblains (pernio) are painful, itchy patches of inflamed skin that develop on the toes and feet after repeated exposure to cold, damp conditions. They cause redness, swelling, blistering, and sometimes open sores when the skin rewarms too rapidly.

What is the best treatment for chilblains?

Treatment includes gradual rewarming (never direct heat), topical corticosteroid creams to relieve itching, keeping the area clean and bandaged if broken, and nifedipine (a calcium channel blocker) prescribed by a doctor for recurrent severe cases.

Still have a question about coverage or cost? Book online and we will check your benefits before your visit: Book in Howell · Book in Bloomfield Township. Prefer to talk it through first? Call (810) 206-1402.