What would be the cause of Dark Circles and Visible Veins under eyes?

The skin around your eyes is soooo delicate. It is probably done because of the rubbing. You shouldn't tug or rub on the skin around the eyes it causes dark circles, and also causes premature wrinkles. If they bother you, you can try slicing a potato in half and placing them on your eyes for a while. It differs with people so maybe it works for you it may not. If that doesn't work then try using concealer. Good luck.