Contrary to popular belief, oils and lotions don’t sink into the skin.
This is a good thing, since skin must present a barrier to such things as disease and infection.
Human skin actually supplies its own natural moisturizer to keep itself from drying and cracking, but soaps, water, cold air, and dry heat can remove it.
Lotions and bath oils lie on top of the skin, keeping outside elements from stripping away the skin’s natural oil.
Dry skin is also known as Xeroderma and commonly occurs on the scalp, lower legs, the sides of the abdomen, and thighs.
When in doubt, moisturize.