You know we all have dark under-eye circles. even babies have dark under-eye circles and there are multiple things that it can be caused by. It can be caused by the skin, the pigmentation, and the Contour changes so when we age everything starts to Sag and then we see this rim of the eye socket much more. It can be due to very thin skin in this area so you can see the blood vessels underneath and we have different approaches for the individual.