Many of the causes of dry skin listed below affect the stratum corneum: the top layer of the epidermis. The stratum corneum works like plastic wrap around the body by keeping harmful substances and germs out and keeping water and oils in, making skin soft and supple.

Before you reach for your favorite moisturizer, see if any of these seven causes could be to blame for your dry skin.

Conversely, even weather in warm areas can cause dry skin. For example, desert regions might have warm temperatures, but they also have low humidity levels, which strips the skin of moisture.