Asteatotic Eczema: Why Your Skin Cracks and Itches in Winter

Understanding Asteatotic Eczema

Asteatotic eczema is a type of inflammatory skin condition that develops when the skin becomes severely dry (a condition called xerosis). The name comes from Greek roots meaning “without fat” — reflecting the loss of the skin’s natural oils. You may also hear it called:

• Winter itch
• Xerotic dermatitis (dermatitis from extreme dryness)
• Eczema craquelée (French for “crackled eczema”)

Unlike other forms of eczema, asteatotic eczema is not driven by allergies or an inherited immune condition. Instead, it is a reaction to profound water loss from the skin’s surface. When the outer skin layer (the stratum corneum) loses too much moisture, it becomes brittle and cracks, and the immune system kicks in with an inflammatory response that causes redness and itching.

The condition is most common in adults over 65 — prevalence rises to 15–20% in those over 75 — because aging skin naturally produces less oil and is less efficient at holding onto water. It tends to flare in winter when indoor heating dramatically drops the humidity in your home.

Signs and Symptoms

The hallmark of asteatotic eczema is its distinctive cracked pattern, which is often described as looking like:

• Cracked porcelain or a shattered windshield
• A dried-up riverbed or cracked earth

Other common symptoms include:

• Intense itching — nearly universal, often worse at night and when you get warm
• Redness and mild swelling of the affected areas
• Fine, powdery or flaky scaling (different from the thick plaques of psoriasis)
• A feeling of tightness or dryness that may start before any visible rash appears
• Burning or stinging in more severe cases

The most commonly affected areas are the shins (front of lower legs), forearms, hands, and trunk. The face and scalp are rarely affected.

The condition usually follows the seasons in temperate climates — appearing or worsening in fall and winter, then improving naturally in spring and summer as outdoor air becomes more humid.

Causes and Risk Factors

The root cause is loss of water from the outer skin layer. Several factors speed up this process:

Environmental factors:

• Low indoor humidity, especially in heated homes in winter (indoor humidity can drop from 60–70% in summer to as low as 20–30% in heated winter air)
• Hot showers or baths, which strip away natural oils
• Harsh soaps and detergents
• Cold, windy outdoor air

Personal risk factors:

• Age over 65 (older skin makes less oil and loses water more easily)
• Female gender (slightly more common in women)
• History of eczema (atopic dermatitis), asthma, or hay fever
• Frequent bathing or swimming
• Jobs that involve repeated hand washing or water contact (nurses, hairdressers, food handlers)
• Medications including retinoids, diuretics (“water pills”), and some antihistamines, which can reduce skin oil
• Underactive thyroid (hypothyroidism) — doctors may check thyroid levels in older adults with new severe dry skin

How It’s Diagnosed

A dermatologist or doctor can usually diagnose asteatotic eczema from its appearance alone. The cracked pattern combined with winter onset and location on the shins or forearms is very characteristic.

No special tests are typically needed. However, your doctor may:

• Check thyroid function if the dryness is severe and newly developed in an older adult
• Order a skin biopsy (a small sample taken under local anesthesia) in unclear cases to rule out other conditions
• Take a culture if the skin looks infected

Conditions that can look similar include psoriasis (thicker, well-defined red plaques with silver scaling), contact dermatitis (associated with a specific trigger), and fungal infections (diagnosed with a KOH skin scraping test).

Treatment Options

The most important treatment for asteatotic eczema is restoring moisture to the skin. Anti-inflammatory medicines alone will not solve the problem if the skin keeps losing water.

1. Moisturize frequently and generously

• Apply a thick cream or ointment (not a thin lotion) at least 2–3 times a day
• The best time is within 3 minutes of getting out of the bath or shower, while skin is still slightly damp — this locks in moisture
• Good choices include CeraVe Moisturizing Cream, Eucerin, Cetaphil Rich Cream, or plain petroleum jelly (petrolatum)
• Products with ceramides, hyaluronic acid, glycerin, or dimethicone are especially effective at repairing the skin barrier
• There is no such thing as moisturizing too often — reapply whenever your skin feels dry

2. Modify your environment

• Use a humidifier in your bedroom and living areas, aiming for 40–50% relative humidity
• Clean the humidifier regularly to prevent mold growth
• Keep showers and baths short (under 5–10 minutes) and use lukewarm water rather than hot water
• Bathe only 2–3 times a week if possible during flare-ups
• Switch to a fragrance-free, gentle cleanser (such as Dove unscented or CeraVe Hydrating Cleanser)

3. Reduce inflammation

• Topical steroid creams help during active flare-ups:
  • Hydrocortisone 1% for mild cases or the face
  • Triamcinolone 0.1% cream for the body, applied twice daily
  • Stronger steroids (clobetasol 0.05%) for short courses of 7–10 days in severe cases
• Topical calcineurin inhibitors such as tacrolimus (Protopic) or pimecrolimus (Elidel) are steroid-free options that work well for long-term use without the risk of skin thinning
• Oral steroids (prednisone) may be prescribed for a short course in elderly patients with severe, widespread disease

4. Relieve itching

• Antihistamines such as hydroxyzine (25–50 mg) taken at bedtime improve sleep and reduce nighttime scratching
• Topical creams with pramoxine (a mild numbing agent) or cool menthol (1–2%) provide temporary itch relief
• Apply cool, damp cloths to itchy areas for 10–15 minutes several times a day

What to Expect and Recovery

With consistent moisturizing and environmental changes, about 80–90% of people see significant improvement or complete clearance within 2–4 weeks. The cracked appearance and itching improve first; the skin gradually becomes smoother and more comfortable.

However, asteatotic eczema tends to recur each winter in 60–70% of people in temperate climates. The key to prevention is continuing your moisturizing routine year-round, not just when you are having a flare. Using a humidifier throughout the heating season and switching to gentle cleansers permanently makes a significant difference.

If the skin develops increased redness, warmth, yellow crusting, or pus — which can happen in 5–10% of cases — a secondary bacterial infection may have developed. This requires a course of oral antibiotics.

When to See a Dermatologist

See your doctor or a dermatologist if:

• Your skin is not improving after 2–3 weeks of consistent moisturizing and environmental changes
• The itching is severe enough to disrupt your sleep or daily life
• You see signs of infection (increased redness, warmth, pus, or spreading soreness)
• You are unsure whether you have asteatotic eczema or another skin condition
• You are considering systemic (whole-body) treatment

Frequently Asked Questions

Q: Why does hot water make my skin worse even though it feels soothing?
A: Hot water feels relaxing in the moment, but it strips away your skin’s natural oils and causes more water to evaporate from the skin surface after you dry off. This leaves your skin drier than before. Lukewarm water (below 35°C or 95°F) and short baths or showers minimize this effect, especially when followed immediately by a thick moisturizer.

Q: How often should I really apply moisturizer?
A: At minimum, 2–3 times a day — but more is better. Many people benefit from applying moisturizer every 1–2 hours, especially immediately after bathing. There is no upper limit. The more consistently and frequently you moisturize, the faster your skin will heal and the longer it will stay comfortable.

Q: Will asteatotic eczema go away on its own without treatment?
A: It often improves naturally in spring and summer as outdoor humidity rises. However, waiting for spontaneous improvement without treatment means weeks or months of unnecessary itching and an increased risk of skin infection. With proper moisturizing, most cases clear within 2–4 weeks rather than waiting out the entire winter.

Q: Is asteatotic eczema contagious?
A: No. Asteatotic eczema is not caused by a virus, bacteria, or fungus — it is an inflammatory condition triggered by environmental dryness. You cannot catch it from another person or spread it to others. If a secondary bacterial skin infection develops in the cracks, that infection could theoretically be transferred through open wounds, but the eczema itself is not contagious.