Have you ever looked at pictures of celebrities with make-up then compared them to the pictures of the same people without make-up on? One thing that becomes quickly noticeable are under eye dark areas. When the under eye area is dark it makes one look stressed and a lot like they're lacking sleep. There are many reasons we have noticeable under eye darkness. For one, the skin is thin and the capilaries are close to the skin's surface. Over exposure to the sun darkens the skin therefore under the eyes get even darker. Lack of sleep lightens the skin and in turn enhances dark circles. Age is one unavoidable cause of dark under eye areas; and, for some persons it is hereditary. Don't even start worrying! There are ways to lighten the dark areas under your eyes naturally.