Xerosis (Asteatotic Eczema): Causes, Symptoms, and Treatment

What is Xerosis (Asteatotic Eczema)?

Xerosis, commonly known as dry skin, can progress into a more severe condition called asteatotic eczema (also called eczema craquelé or winter itch). This condition occurs when the skin becomes extremely dry, leading to cracking, scaling, and inflammation. Asteatotic eczema often appears as a pattern of shallow cracks resembling "crazy paving" or dried riverbeds, particularly on the legs, arms, and trunk.

The skin's outermost layer (stratum corneum) loses moisture and natural oils, compromising its barrier function. This makes the skin more susceptible to irritation, infection, and inflammation. While xerosis is common in older adults, asteatotic eczema can affect people of all ages, especially in dry or cold climates.

Sources: Mayo Clinic, National Institutes of Health (NIH)

Common Causes

Several factors can contribute to the development of xerosis and asteatotic eczema. These include:

• Aging – Skin naturally loses moisture and oil production as we age, making it more prone to dryness.
• Cold, dry weather – Low humidity and indoor heating can strip the skin of its natural oils.
• Excessive washing or hot showers – Frequent exposure to water, especially hot water, can disrupt the skin barrier.
• Harsh soaps and detergents – These can remove natural oils, leading to dryness and irritation.
• Underlying skin conditions – Such as atopic dermatitis or psoriasis.
• Medical conditions – Including diabetes, hypothyroidism, and kidney disease.
• Medications – Diuretics, retinoids, and some cholesterol-lowering drugs can contribute to dry skin.
• Dehydration – Inadequate water intake can affect skin hydration.
• Nutritional deficiencies – Lack of essential fatty acids (like omega-3s) or vitamins (A, D, E) can impair skin health.
• Genetic predisposition – Some people are more prone to dry skin due to inherited traits.

Sources: Centers for Disease Control and Prevention (CDC), Cleveland Clinic

Associated Symptoms

Xerosis and asteatotic eczema often present with the following symptoms:

• Dry, rough, or scaly skin
• Redness or inflammation
• Itching (pruritus), which can be severe
• Fine cracks or fissures in the skin (resembling cracked porcelain)
• Pain or tenderness, especially in cracked areas
• Flaking or peeling skin
• Thickened or leathery skin in chronic cases
• Secondary infections (bacterial or fungal) due to broken skin

These symptoms often worsen in dry or cold environments and may improve with proper skin care.

Sources: World Health Organization (WHO), American Academy of Dermatology (AAD)

When to See a Doctor

While mild dry skin can often be managed at home, you should consult a healthcare provider if:

• Your skin does not improve with over-the-counter moisturizers.
• You develop severe itching that disrupts sleep or daily activities.
• You notice signs of infection (increased redness, swelling, pus, or warmth).
• Your skin becomes painful or starts bleeding.
• You have large areas of cracked or inflamed skin.
• Your symptoms worsen despite home treatment.

A dermatologist can help determine if an underlying condition (like eczema or thyroid disorder) is contributing to your symptoms.

Diagnosis

Doctors typically diagnose xerosis and asteatotic eczema through:

• Medical history – Discussing symptoms, triggers, and past skin conditions.
• Physical examination – Inspecting the skin for dryness, cracks, and inflammation.
• Patch testing – If allergic contact dermatitis is suspected.
• Blood tests – To check for underlying conditions like thyroid disorders or nutritional deficiencies.
• Skin biopsy – Rarely needed, but may be done if the diagnosis is unclear.

In most cases, no advanced testing is required, and the diagnosis is based on visual inspection.

Sources: NIH, Mayo Clinic

Treatment Options

Medical Treatments

• Topical corticosteroids – To reduce inflammation and itching (e.g., hydrocortisone cream).
• Prescription moisturizers – Such as urea or lactic acid-based creams to exfoliate and hydrate.
• Antihistamines – To relieve severe itching (e.g., cetirizine or diphenhydramine).
• Antibiotics or antifungals – If a secondary infection is present.
• Topical calcineurin inhibitors – Like tacrolimus or pimecrolimus for persistent eczema.

Home and Lifestyle Treatments

• Moisturize regularly – Use thick, fragrance-free emollients (e.g., petroleum jelly, ceramide-based creams).
• Avoid hot showers – Use lukewarm water and limit bathing time.
• Use gentle cleansers – Choose mild, soap-free products.
• Humidify your home – Especially in dry or winter months.
• Wear soft, breathable fabrics – Like cotton, and avoid wool or synthetic materials.
• Stay hydrated – Drink plenty of water and eat a balanced diet rich in healthy fats.

Sources: AAD, Cleveland Clinic

Prevention Tips

To prevent xerosis and asteatotic eczema:

• Apply moisturizer immediately after bathing to lock in moisture.
• Use sunscreen to protect skin from UV damage, which can worsen dryness.
• Avoid excessive scrubbing or exfoliation.
• Limit exposure to harsh chemicals or irritants.
• Maintain a healthy diet with omega-3 fatty acids (found in fish, flaxseeds, and walnuts).
• Stay hydrated by drinking enough water daily.

Emergency Warning Signs

Seek immediate medical attention if you experience:

• Signs of a severe skin infection (fever, chills, spreading redness, or pus).
• Large areas of open, bleeding, or oozing skin.
• Severe pain or swelling in the affected area.
• Symptoms of an allergic reaction (difficulty breathing, swelling of the face or throat).

These symptoms may indicate a serious complication requiring urgent care.