Eczema sufferers should bathe or shower in lukewarm water. Hot water does several things to the skin that eczema doesn’t like. First, it makes you sweat. You don’t notice it because you’re literally covered with water, but the heat does make you sweat, which we already know dries out the skin. But hot water can also strip the skin of naturally moisturizing oils, leaving the skin even drier. Avoid hot showers and baths, and as a precaution, apply a natural moisturizer (i.e. no fragrances or other irritants) after showers and baths, in case the water did dry out the skin.