What Is Dry Skin and How Is It Caused?
Dry skin (or xerosis) has a low level of sebum, which is the skin's natural lubricant. As it does not have enough sebum, it dries out easily and is unable to retain the right amount of moisture needed for healthy skin.
A number of factors may cause dry skin. It is more common in winter when the cold outside and the heat inside contribute in drying up the skin. It can also be caused by hot water or harsh soaps. Poor diet or smoking can also cause or aggravate the problem. Dry skin may also be a symptom of other conditions, including dermatitis, eczema, ichthyoids, psoriasis, an under active thyroid and diabetes. Dry skin becomes more common as people age.
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