
To be sure, the most likely cause is simply dry skin ... but it's best to be sure.
To treat dry skin, first ensure you practice proper nutrition and hydration. Drink ample amounts of water -- most people don't drink enough. Improper hydration is a major cause of dry skin.
Review your nutrition and vitamin intake -- especially Vitamin A. If your diet lacks green vegatables, you're probably lacking Vitamin A. Consider a good daily multi-vitamin tablet -- as well as modifying your diet.
Finally, consider what skin cleansing products you use. If you use soap -- then you've probably got a problem. Most soaps are simply too harsh for your skin -- soaps are great for washing dishes and clothes, but your skin is another story entirely.
The safest soaps for your skin are those with NO synthetics or chemicals -- look for all-natural ingredients. All natural cleansers will help hydrate and moisturize your skin.
Essentally, if you use a soap you see advertised on TV, you probably should stop using it! Spend a little more time and try an all natural type! Your skin will show the difference after a short time!