Though the main reason is lack of proper moisture, there can be plenty of other reasons too. If you feel that you are having an exceptionally dry skin, you may be suffering from multiple skin problems including sensitive skins. It is better to consult a skin specialist in such case.

Dry skin is also a problem as we age. The skin looses the adequate supply of collagen and elastin that keep the skin moist and tight. For some this may come after 50s while for others it can come as early as 30s. Whatever be the case, use moisturizers that are natural extracts to avoid side affects such as rashes and allergies caused by chemical moisturizers.