What Are Chilblains?
Chilblains (also called pernio) are localized inflammatory skin lesions that develop as an abnormal response to cold exposure, appearing as painful, red-purple, swollen areas typically on your fingers or toes. 1
Understanding the Condition
Chilblains develop when your skin is exposed to cold (but not freezing) temperatures, usually appearing 12-24 hours after cold exposure. 1 The lesions are:
- Red-purple, swollen patches on fingers or toes 1
- Painful, itchy, or burning in sensation 1
- Different from frostbite (which involves actual tissue freezing) 1
- Different from Raynaud's phenomenon (which causes sharply demarcated color changes lasting hours, not days) 1, 2
The condition typically starts in fall or winter and resolves in spring or early summer. 1
Who Gets Chilblains?
You may be more susceptible if you have:
- Thin body habitus (lower BMI) 1, 3
- Female gender (more common in young women and adolescent girls) 1, 3
- Underlying conditions like lupus, antiphospholipid antibodies, or inflammatory arthritis 1, 4
- History of cold exposure combined with inadequate protection 1
Important Warning Signs
Seek immediate evaluation if you have chilblains with any of these features, as they may indicate secondary causes requiring different treatment:
- Severe, persistent pain with digital ulcers 5
- Joint pain, skin changes, or systemic symptoms 6
- Fever (rare in simple chilblains) 7
- Tissue necrosis or gangrene 8
These red flags suggest possible underlying conditions like systemic sclerosis, lupus, or vasculitis rather than simple chilblains. 5, 6
How to Manage Chilblains
Immediate Care
The most important initial step is rewarming and protecting the affected area:
- Clean and dry the affected limb 1
- Rewarm gradually (avoid rapid rewarming) 1
- Avoid scratching or trauma to the lesions 1
Prevention (Most Important)
Prevention is the best therapy—minimizing cold exposure after an initial episode is critical: 1
- Wear proper warm clothing including mittens (not gloves), insulated footwear, and warm socks 5, 6
- Avoid cold and damp conditions 4
- Keep extremities warm and dry at all times 1
- Avoid fashion choices that expose skin (like sandals in winter) 1
Medical Treatment
For Simple (Primary) Chilblains:
Nifedipine is the most effective medication, producing vasodilation that reduces pain, facilitates healing, and prevents new lesions. 1 This is a calcium channel blocker typically used at standard doses. 5
When to Consider Underlying Disease:
If chilblains are severe, recurrent, or associated with systemic symptoms, testing may be needed to exclude:
- Autoimmune diseases (lupus, systemic sclerosis) 1, 2
- Cryoproteins or clotting abnormalities 1
- Antiphospholipid antibodies 1, 4
Laboratory evaluation should include ANA, ESR/CRP, and potentially antiphospholipid antibodies if secondary causes are suspected. 2
For Secondary Chilblains (Associated with Underlying Disease):
Immunosuppressive treatment with corticosteroids and disease-modifying drugs may be necessary if chilblains are associated with inflammatory arthritis or autoimmune conditions. 4 This requires specialist rheumatology evaluation. 4
Expected Course
With proper treatment and cold avoidance, the prognosis is excellent. 1 Acute chilblains are usually self-limited but may recur with repeated cold exposure. 1 Chronic chilblains occur when lesions persist due to repeated cold exposure. 1, 3
Common Pitfalls to Avoid
- Don't confuse chilblains with Raynaud's phenomenon—Raynaud's has sharply demarcated color changes lasting hours, while chilblains persist for days 1, 2
- Don't ignore systemic symptoms—fever, joint pain, or severe ulceration warrant evaluation for underlying disease 6, 7
- Don't allow continued cold exposure—this is the most common reason for treatment failure 1
- Don't use beta-blockers if prescribed for other conditions, as they can worsen symptoms 5, 2