Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Hills, MI
Last reviewed: May 2026
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Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
Michigan winters create ideal conditions for chilblains — the prolonged cold, damp weather that is our seasonal norm is the primary environmental trigger for this painful but underrecognized condition. As a podiatrist in western Michigan, I see chilblains cases from November through March, with peaks during the sudden cold snaps that characterize Great Lakes winters. Most patients initially assume they have frostbite, infection, or an allergic reaction before receiving the correct diagnosis.
What Are Chilblains (Pernio)?
Chilblains — medically termed pernio or perniosis — are an abnormal inflammatory response to cold and damp exposure. They are distinct from frostbite: frostbite involves actual tissue freezing and ice crystal formation; chilblains do not. Instead, chilblains represent a pathological vasomotor reaction to cold — blood vessels constrict excessively in response to cold, and when rewarmning occurs, vessel dilation is abnormal and inflammatory mediators leak into surrounding tissue, producing the characteristic red, swollen, itchy, burning lesions.
Chilblains typically appear on the toes, heels, and lateral foot — the most peripherally perfused areas most affected by cold-induced vasoconstriction. Classically, the lesions are small, erythematous (red to purple) patches or plaques that are warm, itchy, and mildly painful. They appear hours after cold exposure, not during it — the delayed onset after coming indoors is a characteristic feature. Lesions may blister or ulcerate in severe cases.
Who Gets Chilblains?
Chilblains are more common in women than men, in lean individuals, and in patients with pre-existing vascular conditions — likely because adipose tissue provides thermal insulation and patients with vascular disease have baseline impaired peripheral blood flow. Conditions associated with increased chilblains risk include Raynaud’s phenomenon, lupus erythematosus, cryoglobulinemia, and antiphospholipid syndrome. Young, thin women who work or spend significant time outdoors in cold Michigan winters are the highest-risk population.
The COVID-19 pandemic produced a distinct chilblains-like phenomenon termed “COVID toes” — inflammatory lesions on the toes and feet associated with SARS-CoV-2 infection or immune response, histologically resembling pernio. Whether this represents true chilblains from behavioral changes (increased time at home in cold conditions) or a direct viral vascular effect remains debated, but it brought renewed attention to the clinical presentation of toe inflammatory lesions in young patients.
Symptoms and Clinical Presentation
The typical chilblains presentation follows a predictable timeline. During cold exposure, the affected areas feel numb or cold but are not painful. Hours after coming indoors — often in the evening after an outdoor work day or winter activity — the toes develop burning, itching, and redness. The itch can be intense and is frequently the most distressing symptom. Rubbing or scratching worsens the inflammation and delays resolution. Over several hours, the erythema may deepen to a purple hue as venous congestion develops.
In mild cases, the lesions resolve within 1-3 weeks with warming and avoidance of re-exposure. Moderate cases persist for weeks or develop superficial blisters. Severe cases — particularly in patients with underlying vascular disease — develop ulceration requiring wound care management. Recurrent chilblains over multiple seasons produce chronic changes: skin thickening, persistent discoloration, and reduced cold tolerance as vascular reactivity is sensitized.
Diagnosis: Distinguishing Chilblains from Other Conditions
Chilblains are frequently misdiagnosed. The most common diagnostic errors are confusing chilblains with frostbite, cellulitis, contact dermatitis, or vasculitis. Key distinguishing features:
Frostbite requires temperatures below freezing with actual tissue freezing; presents with white or gray waxy skin, numbness, and develops during cold exposure rather than hours later. Chilblains occur with above-freezing temperatures and damp conditions and appear after rewarming.
Cellulitis is a bacterial skin infection producing spreading redness, warmth, and systemic signs (fever, malaise); it is not bilateral, not seasonal, and is not triggered by cold exposure. Chilblains are typically symmetric and clearly associated with cold weather.
Erythromelalgia — a rare vascular condition causing hot, red, painful extremities — is triggered by warmth rather than cold, making the history essential for distinction.
When chilblains are severe, recurrent, or present in an atypical patient (older patients, male patients, summer onset), laboratory evaluation for underlying systemic disease is warranted: ANA, complement levels, cryoglobulins, antiphospholipid antibodies, and cold agglutinins evaluate for lupus, cryoglobulinemia, and antiphospholipid syndrome.
Treatment
Immediate Management
The most important immediate intervention is gradual rewarming. Moving cold feet directly to heat — hot water, heating pads, or fire — dramatically worsens chilblains by accelerating the inflammatory vasodilation in damaged tissue. Instead: remove wet or cold footwear, allow feet to rewarm passively at room temperature, apply loose warm socks, and elevate the feet to reduce dependent edema. Avoid rubbing or massaging the affected areas, which worsens tissue damage and inflammation.
Topical Treatments
Topical nifedipine gel (a calcium channel blocker that promotes vasodilation) applied to affected areas reduces healing time and symptom severity. While not universally available in compounded form in all pharmacies, it represents the most evidence-based topical option. Topical corticosteroid creams (hydrocortisone 1% over-the-counter or stronger prescription formulations) reduce inflammatory symptoms and itch significantly. Topical treatments are most effective during the early erythematous phase before ulceration develops.
Oral Medications for Severe Cases
Oral nifedipine (30-60 mg/day extended release) is the most evidence-supported systemic treatment for recurring or severe chilblains, acting as a peripheral vasodilator that reduces the vasoconstrictive response to cold. Blood pressure monitoring is appropriate during treatment, as nifedipine produces systemic vasodilation. Other vasodilators including pentoxifylline and topical minoxidil have been used with variable results. For chilblains associated with lupus, hydroxychloroquine reduces flare frequency.
Wound Care for Ulcerated Chilblains
Blistered or ulcerated chilblains require proper wound care to prevent secondary bacterial infection. Intact blisters should not be drained unless tense and causing significant pain — the blister roof protects the underlying tissue. If blisters rupture, gentle cleansing with saline or gentle soap, application of petrolatum-based ointment, and non-adhesive dressings protect the wound bed. Diabetic patients with chilblains ulcers require podiatric wound care management, as their impaired healing significantly increases infection risk.
Prevention: The Most Important Intervention
Prevention is far more effective than treatment for recurrent chilblains. Key prevention strategies include: wearing moisture-wicking sock layers under warm outer socks for outdoor exposure, ensuring footwear is waterproof and thermally insulated for Michigan winter conditions, changing wet socks and footwear immediately upon coming indoors, gradual rewarming after cold exposure rather than direct heat application, and avoiding tobacco which dramatically reduces peripheral circulation. For patients with known Raynaud’s phenomenon or vascular risk factors, preventive oral nifedipine through the cold season significantly reduces chilblains episodes.
When to Seek Immediate Care
Seek prompt medical evaluation for: chilblains that develop ulcers or do not improve within 2-3 weeks, any foot wound in a diabetic patient, chilblains presenting in summer or warm weather (suggests systemic disease), chilblains accompanied by joint pain, facial rash, or other systemic symptoms (possible lupus), severe asymmetric chilblains (more likely to be vascular disease than environmental), and any patient over 60 with new-onset chilblains (warrants investigation for occult malignancy or cryoglobulinemia).
Dr. Tom's Product Recommendations
Carhartt Arctic Quilt-Lined Duck Work Boot
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Dr. Tom says: “”After two winters of chilblains from wet work boots, my podiatrist told me waterproof insulation was the key. These boots changed everything — no chilblains this winter.””
Outdoor workers, winter conditions, chilblains prevention, Michigan winter footwear
Heavier than standard work boots; warm weather use causes overheating
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Darn Tough Merino Wool Boot Sock — Full Cushion
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Vermont-made merino wool boot socks with moisture management and thermal regulation. Wool maintains warmth when wet — critical for Michigan outdoor workers where damp conditions trigger chilblains. Lifetime guarantee.
Dr. Tom says: “”My podiatrist specifically recommended merino wool for chilblains prevention. These socks stay warm even when wet and dry quickly. Haven’t had a chilblains episode since switching.””
Chilblains prevention, outdoor workers, winter sports, wet cold Michigan conditions
Higher cost than synthetic alternatives; requires proper laundering to maintain wool properties
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CeraVe Healing Ointment — Skin Protectant
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Petrolatum-based healing ointment for protecting toe and foot skin in early-stage chilblains and post-blister wound care. Creates barrier protection while allowing healing. Gentle enough for daily preventive toe skin maintenance.
Dr. Tom says: “”Applied this to my toes every morning during cold season on my podiatrist’s recommendation. Prevented the cracking and skin breakdown I’d had with chilblains in prior winters.””
Early chilblains skin care, blister wound protection, preventive toe skin barrier maintenance
Greasy texture requires socks over application; not for use on open wounds requiring specialized dressings
Disclosure: We earn a commission at no extra cost to you.
✅ Pros / Benefits
- Chilblains are benign and resolve in most cases with appropriate conservative care
- Gradual rewarming and topical treatment effective for typical presentations
- Prevention highly effective — proper waterproof insulated footwear and wool socks dramatically reduce incidence
- Oral nifedipine prevents recurrence in high-frequency patients through cold season
- Most patients can manage mild cases with guidance from their podiatrist
❌ Cons / Risks
- Recurrent chilblains indicate need for systemic workup to exclude lupus, cryoglobulinemia, and other vascular disease
- Diabetic patients with chilblains ulcers face significantly higher infection and healing complication risk
- Direct heat application to cold feet worsens rather than helps chilblains
- Oral nifedipine requires blood pressure monitoring and is not appropriate for all patients
- Atypical presentations (summer, asymmetric, older patients) require investigation beyond environmental triggers
Dr. Tom Biernacki’s Recommendation
Chilblains are a genuinely Michigan problem — our wet, cold winters create exactly the damp-cold exposure pattern that triggers this condition. What I want patients to know is that this is not frostbite and it doesn’t require emergency care in most cases, but it does require proper management — particularly the counterintuitive instruction to not put your cold feet near direct heat. Gradual rewarming, topical treatment, and proper winter footwear resolve the vast majority of chilblains cases. The patients I worry about are those who’ve had recurring episodes for multiple winters, or whose chilblains appear outside the cold season — that pattern warrants a workup for lupus and other systemic vascular conditions.
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
Are chilblains the same as frostbite?
No — chilblains and frostbite are distinct conditions. Frostbite involves actual freezing of tissue and requires temperatures below freezing. Chilblains occur with cold and damp conditions above freezing and represent an abnormal inflammatory vascular response rather than tissue freezing. Frostbite causes white or gray waxy skin with numbness during exposure; chilblains cause red to purple itchy burning patches that appear hours after coming indoors. Treatment differs significantly — frostbite may require emergency care; most chilblains resolve with conservative management.
Why do my toes itch so much after coming in from the cold?
Intense itching after cold exposure is the cardinal symptom of chilblains. It results from the abnormal vasodilatory response as cold-constricted vessels dilate upon rewarming, releasing inflammatory mediators into surrounding tissue. The itch can be severe enough to disrupt sleep. Avoiding rubbing or scratching is important — it worsens inflammation and delays healing. Topical hydrocortisone reduces itch significantly. Antihistamines provide modest relief and can improve sleep.
Can chilblains lead to permanent damage?
Most chilblains episodes resolve without permanent damage. Severe or neglected cases can ulcerate, potentially leaving minor scarring. Patients with recurrent annual chilblains may develop chronic skin changes including persistent discoloration and reduced cold tolerance as vasomotor reactivity is sensitized over time. Diabetic patients face significantly higher risk of permanent damage from ulcerated chilblains due to impaired healing and infection risk.
Should I put my cold feet in warm water for chilblains?
No — this is one of the most common mistakes with chilblains. Direct heat application to cold feet exacerbates the abnormal vasodilation and worsens inflammation. Instead: remove wet footwear, allow feet to rewarm gradually at room temperature, apply loose warm (not hot) socks, and elevate feet. Avoid hot water, heating pads, or sitting near a fire with cold feet. Gradual passive rewarming is the correct approach.
Could my recurring chilblains indicate a serious medical condition?
Recurring, persistent, or atypical chilblains can indicate lupus erythematosus, Raynaud’s phenomenon, cryoglobulinemia, antiphospholipid syndrome, or other systemic vascular conditions. Indicators that warrant further workup: chilblains appearing in warm weather, severe bilateral toe lesions, associated joint pain or fatigue, photosensitivity, or family history of autoimmune disease. Routine environmental chilblains in Michigan winters in otherwise healthy young patients generally do not require systemic workup beyond the first episode.
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How long does treatment take to work?
Most patients see improvement in 4-8 weeks with consistent conservative care. Persistent symptoms after 8 weeks need imaging and escalation.
When is surgery needed?
Surgery is reserved for cases that fail 3-6 months of conservative care, structural deformities, or fractures requiring stabilization.
Is this covered by insurance?
Most diagnostic visits and conservative treatments are covered by Medicare and major insurers. Custom orthotics often require diabetic or post-surgical justification.
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📋 Dr. Tom Biernacki, DPM, FACFAS answers:
Chilblains (pernio) represent a non-freezing cold injury to the superficial dermal vessels triggered by repeated exposure to cold damp conditions — the 32-to-60-degree Fahrenheit range that Michigan winters produce throughout November to March. The pathophysiology involves abnormal vasomotor response: small arterioles constrict excessively in the cold, causing local ischemia, then dilate erratically on rewarming with resultant inflammatory edema and the characteristic red-to-purple blotchy discoloration, itching, and burning pain on the toes, heels, and dorsal feet. Michigan patients are particularly susceptible because our winters involve repeated cold-wet cycles rather than consistently dry freezing temperatures. My management begins with confirming the diagnosis and ruling out secondary causes: systemic lupus erythematosus, antiphospholipid syndrome, and cold agglutinin disease can all produce chilblain-like lesions that require disease-specific treatment beyond local skin care. An ANA panel is ordered in any patient with unusual, severe, or recurrent chilblains without clear cold exposure history. Topical clobetasol or betamethasone cream applied during active flares reduces local inflammation and relieves the intense itch. Nifedipine 20 to 60 mg daily is the first-line systemic treatment for recurrent or severe chilblains — it reduces sympathetic vasospasm and significantly decreases flare frequency and severity in the winter months. Protective measures form the foundation: insulated waterproof footwear, moisture-wicking wool socks, chemical toe warmers during extended cold exposure, and avoidance of wet footwear. Rewarming should always be gradual — direct heat sources worsen the inflammatory cascade and should never be used.
Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has made him one of the most-followed foot & ankle educators on YouTube.