Xerosis is the medical term for unusually dry skin. It commonly appears as roughness, scaling, tightness, itching, or small cracks and becomes more common as skin ages. Everyday skin care can often improve comfort by reducing water loss and supporting the outer skin barrier.
Why does skin become dry?
The outermost skin layer, the stratum corneum, helps keep water inside the body and environmental irritants outside. Its barrier depends on both skin cells and a carefully organized mixture of lipids. Dryness can develop when that barrier is disrupted or when the skin contains less water or surface lipid than usual.
Common contributors include aging, low humidity, cold weather, frequent bathing, harsh cleansers, repeated handwashing, and some health conditions or medications.
Why xerosis is common in mature skin
Research on mature skin describes age-related reductions in epidermal lipids and other barrier changes that can make dryness more likely. The National Institute on Aging also notes that older skin tends to become thinner and may produce less oil and sweat.
What helps support dry skin?
- Use gentle cleansers. Avoid unnecessarily harsh or strongly fragranced products when skin is already irritated.
- Keep bathing moderate. Long, very hot showers can worsen dryness for some people.
- Moisturize soon after bathing. Applying a lotion, cream, or ointment to slightly damp skin can help reduce water loss.
- Moisturize consistently. Regular use generally matters more than occasional heavy application.
- Pay attention to the environment. Cold air, indoor heating, and low humidity can increase dryness.
Studies in people with mature xerosis have found improvements in hydration and barrier measurements with regular use of moisturizers, including formulations containing barrier-related ingredients such as ceramides.
What should you look for in a moisturizer?
Different moisturizers use different combinations of humectants, emollients, and occlusive ingredients. Humectants help attract water, emollients smooth spaces between surface cells, and occlusives reduce water loss. A product does not need to be complicated to be useful; tolerability and consistent use are important.
Browse McCord Health moisturizers, skin barriers and protectants, or the full skin-care collection.
When to seek professional care
Severe cracking, bleeding, signs of infection, widespread rash, persistent itching, or dryness that does not improve with routine care can have causes beyond simple xerosis. A dermatologist or other qualified healthcare professional can help determine the cause.
Bottom line
Dry skin is often a barrier problem. Gentle cleansing, regular moisturization, and reducing unnecessary exposure to heat and irritants are practical first steps for supporting skin comfort and hydration.
Sources and further reading
- National Institute on Aging: Skin Care and Aging.
- Peer-reviewed studies of moisturizers and barrier support in mature xerosis.
This article is for general educational purposes and is not medical advice. Seek professional care for persistent, severe, or unexplained skin symptoms.
