Xerosis (Dry Skin)

Overview

Xerosis is the medical term for abnormally dry skin. Healthy skin holds water and natural oils that keep it smooth and supple. When the skin loses too much moisture or does not produce enough protective oil, it becomes dry, rough, and prone to flaking and itching.

Xerosis is extremely common and usually harmless. It tends to be worse in winter, in dry climates, and with age, and most cases respond well to simple changes in skin care. Occasionally, very dry skin is a sign of an underlying condition or a side effect of medication.

Symptoms

Dry skin can affect any part of the body but is most common on the lower legs, arms, hands, and face. Signs include:

• A feeling of skin tightness, especially after bathing
• Rough, flaky, or scaly skin
• Itching, which may be mild or intense
• Fine lines or cracks in the skin
• Skin that looks dull, ashy, or gray, particularly on darker skin tones
• Redness in irritated areas

In severe cases the skin can crack deeply enough to bleed, which raises the risk of infection.

Causes

Xerosis develops when the skin loses moisture faster than it can replace it. Common contributors include:

• Environment: Cold, dry winter air, low humidity, and indoor heating.
• Washing habits: Long, hot showers and harsh soaps that strip natural oils.
• Aging: Older skin produces less oil and holds less water.
• Medical conditions: Eczema, psoriasis, hypothyroidism, diabetes, and kidney disease.
• Medications: Diuretics, some cholesterol-lowering drugs, and certain acne treatments.

Risk Factors

• Older age
• Living in a cold or dry climate
• Frequent hand washing or bathing in hot water
• Jobs that involve repeated water or chemical exposure
• Skin conditions such as eczema or psoriasis
• Underlying conditions like diabetes or thyroid disease

Diagnosis

Xerosis is usually diagnosed by a simple examination of the skin and a few questions about bathing habits, climate, and overall health. No special tests are normally needed. If the dryness is severe, sudden, or not responding to moisturizing, a doctor may order blood tests to check for thyroid, kidney, or other conditions, or refer you to a dermatologist to rule out eczema or another skin disease.

Treatment

Most dry skin improves with consistent self-care:

• Moisturize often: Apply a thick cream or ointment at least twice daily and right after bathing, while the skin is still damp.
• Gentle cleansing: Use mild, fragrance-free cleansers and lukewarm rather than hot water.
• Short baths: Limit showers to a few minutes and pat skin dry instead of rubbing.
• Humidify: Add moisture to indoor air, especially in winter.

For stubborn or itchy dryness, a doctor may recommend creams containing urea, lactic acid, or a short course of a mild steroid cream to calm inflammation.

Self-Care and Prevention

• Apply moisturizer immediately after washing
• Choose fragrance-free, gentle soaps and laundry products
• Avoid very hot, long showers
• Use a humidifier in dry indoor environments
• Wear gloves for cleaning or work that exposes hands to water and chemicals
• Drink enough fluids and protect skin from harsh wind and cold

When to See a Doctor

See a doctor if dry skin does not improve with regular moisturizing, is severe or widespread, or interferes with sleep because of itching. Also seek care if the skin is cracking, bleeding, or shows signs of infection such as redness, warmth, swelling, or pus, or if dryness appears suddenly without an obvious cause, since this can point to an underlying medical condition.

Related Topics

Frequently Asked Questions

References

1. American Academy of Dermatology. Dry skin: Overview.
2. Mayo Clinic. Dry skin — Symptoms and causes.
3. MedlinePlus, U.S. National Library of Medicine. Dry skin.
4. DermNet. Dry skin (xerosis).