Central heating may dry out skin and increase irritation

The article reports dermatologist Dr Emma Craythorne saying dry indoor air from central heating can speed water loss from the skin and trigger mild inflammation; cold, windy outdoor air can be similarly drying.

Central heating and dry winter air are linked to increased skin dryness and irritation, according to the article. Consultant dermatologist Dr Emma Craythorne explains that human skin retains water through a surface barrier but that the barrier is not completely watertight. Skin is said to be most comfortable at about 40% relative humidity, and when surrounding air is drier water is more likely to leave the skin. The piece also notes that cold, windy outdoor conditions can be even more drying than warm indoor air. Key points: - Skin barrier function allows some water movement and is most comfortable at about 40% relative humidity. - Drier surrounding air causes more water to leave the skin; this process is described as mildly inflammatory and can lead to redness and itch. - Central heating can produce a warm but very dry indoor environment that contributes to increased skin water loss. - Cold outdoor air and wind are reported to be strongly drying because cold air holds less moisture and wind speeds evaporation. - People with conditions such as eczema or rosacea are reported to be more susceptible to winter skin irritation. - The article reports Dr Craythorne mentioning measures such as lowering heating, using a humidifier, choosing soap-free cleansers, and using fragrance-free moisturising creams that contain occlusives, ceramides and glycerin. Summary: Dry indoor heat and cold, windy outdoor air are reported to increase skin water loss and mild inflammation, which can present as redness and itch. Undetermined at this time.