More Than Just a Cosmetic Concern
Tight, flaky, cracked skin that no amount of moisturiser seems to fix. Itching that keeps you awake. Skin so dry it splits and bleeds, especially on your hands and lower legs in winter. While dry skin (xerosis) is often dismissed as a minor inconvenience, it can significantly impact comfort and quality of life – and sometimes it signals an underlying medical condition.
At our practice in Zürich Seefeld, I evaluate chronic dry skin thoroughly, because the solution is not always just a better moisturiser.
Common Causes of Chronic Dry Skin
Hypothyroidism: An underactive thyroid reduces sweat gland activity and skin cell turnover, leading to characteristically dry, rough, cool skin. Thyroid-related dry skin improves with thyroid hormone optimisation.
Nutrient deficiencies: Essential fatty acid deficiency (omega-3 and omega-6), zinc deficiency, vitamin A deficiency, and iron deficiency can all manifest as dry, rough skin. These deficiencies impair the skin’s ability to maintain its lipid barrier.
Dehydration: While often overstated, genuine chronic dehydration does affect skin hydration. More importantly, inadequate water intake can be a sign of other issues.
Diabetes and insulin resistance: High blood sugar damages small blood vessels and nerves, impairing skin hydration and healing. Dry skin, particularly on the lower legs and feet, can be an early sign of metabolic dysfunction.
Kidney disease: Impaired kidney function alters fluid balance and waste elimination, often causing dry, itchy skin.
Medication effects: Statins, diuretics, retinoids, and certain other medications can cause or worsen skin dryness.
Environmental factors: Low humidity (particularly in heated indoor environments during Swiss winters), hot showers, harsh soaps, and excessive hand washing strip the skin’s protective lipid layer.
Ageing: Skin produces less sebum and loses moisture-retaining capacity with age, but the rate of decline is influenced by nutrition, hormonal status, and skincare habits.
When Dry Skin Needs Medical Attention
See a doctor if dry skin is severe and unresponsive to regular moisturising, if it is accompanied by intense itching, if the skin is cracking and bleeding, if it appeared suddenly or has changed significantly, or if it is associated with other symptoms (fatigue, weight changes, excessive thirst).
Our Diagnostic Approach
I assess thyroid function, blood sugar (fasting glucose, HbA1c), kidney function, iron studies, zinc, vitamin D, essential fatty acid status, and liver function. I review medications that may be contributing and examine the skin for signs of specific dermatological conditions such as eczema, psoriasis, or ichthyosis.
What We Do: Hydrating From the Inside Out
Treat underlying conditions: Thyroid optimisation, blood sugar management, and correction of nutrient deficiencies address the root cause.
Essential fatty acid supplementation: Omega-3 and sometimes gamma-linolenic acid (GLA from evening primrose oil) to restore the skin’s lipid barrier from within.
Optimal skincare guidance: Evidence-based recommendations on moisturisers (ceramide-based products for barrier repair), bathing habits, and avoiding common irritants.
Hydration and nutrition: Adequate water intake, a diet rich in healthy fats, and specific nutrients that support skin health.
Medication review: Adjusting medications that may be contributing to skin dryness where possible.
Conclusion
Chronically dry skin is often more than a cosmetic issue – it can be a sign of thyroid dysfunction, nutrient deficiency, metabolic disease, or other medical conditions. If your skin remains dry despite good skincare, a medical evaluation at our practice in Zürich Seefeld may reveal the underlying cause and lead to truly effective treatment.
