Black or dark circles under or around the eyes can be caused by many different factors.
However, dark circles under the eyes are usually an inherited trait. If you have dark circles, there is a good chance that others in your family also have them. The skin under the eye is very thin. When blood passes through the large veins close to the surface of the skin it can produce a bluish tint. The more transparent your skin, the darker the circles appear.

The products below are formulated to treat this condition and reduce the appearance of  under eye circles and eye bags.