Xeroderma – Causes, Symptoms and Treatment

What is Xeroderma?

Xeroderma (from the Greek xeros meaning dry and derma meaning skin) is a condition characterized by abnormally dry, rough, and scaly skin. It occurs when the natural protective barrier of the skin is impaired, resulting in excessive moisture loss and reduced sebum production. Xeroderma can present as a standalone skin condition or as a symptom of an underlying systemic disease.

Causes

The causes of xeroderma are diverse and can be divided into primary (skin-related) and secondary (caused by other conditions or external factors) categories:

• Genetic predisposition: A family history of dry skin is a common contributing factor.
• Aging: Sebaceous gland activity decreases with age, leading to drier skin.
• Environmental factors: Cold weather, low humidity, frequent washing, and exposure to harsh detergents can damage the skin barrier.
• Underlying diseases: Hypothyroidism, diabetes mellitus, kidney disease, atopic dermatitis (eczema), and ichthyosis can cause or worsen xeroderma.
• Nutritional deficiencies: Insufficient intake of vitamins (e.g., vitamin A or E) or essential fatty acids can lead to dry skin.
• Medications: Certain drugs such as diuretics, retinoids, or statins may cause dry skin as a side effect.

Symptoms

The symptoms of xeroderma vary depending on severity and may include:

• Rough, flaky, or scaly skin texture
• A feeling of tightness in the skin, especially after bathing
• Itching (pruritus)
• Redness and irritation
• Small cracks or fissures in the skin (rhagades), especially on the hands and heels
• Dull or grayish skin appearance
• In advanced cases: pain and skin inflammation

Diagnosis

Xeroderma is typically diagnosed through a clinical examination by a dermatologist. The diagnostic process may include:

• Visual inspection and palpation of the skin
• Medical history (anamnesis), including lifestyle habits, occupation, and pre-existing conditions
• Blood tests if an underlying disease is suspected (e.g., thyroid function, blood glucose, kidney values)
• Skin biopsy in cases where the diagnosis is unclear

Treatment

Treatment of xeroderma depends on the underlying cause and severity of the condition:

Skincare Measures

• Regular use of emollient and moisturizing creams, lotions, or ointments containing urea, glycerin, hyaluronic acid, or shea butter
• Use of mild, pH-balanced cleansing products
• Bathing or showering with lukewarm rather than hot water
• Adequate daily fluid intake (approximately 1.5 to 2 liters of water)

Medical Treatment

• Short-term application of topical corticosteroids for inflammatory dry skin
• Antihistamines for relief of itching
• Treatment of any underlying condition (e.g., thyroid hormone therapy for hypothyroidism)

Diet and Lifestyle

• Balanced diet rich in vitamins (A, C, E) and healthy fats (omega-3 fatty acids)
• Reducing alcohol and tobacco consumption
• Using a humidifier in dry indoor environments

References

1. German Dermatological Society (DDG): Guidelines on skin care and treatment of dry skin. www.awmf.org
2. Braun-Falco's Dermatology. Springer Verlag, 7th edition (2018).
3. World Health Organization (WHO): Skin conditions factsheet. www.who.int