circles under eyes

Hi again, I posted a question a few days ago about dark circles under my eyes. Thanks to all who responded. My question is, though, exactly why do dark circles appear under you eyes if your liver isn't doing to well? Is this because it's not filtering good enough, and so the toxins are still in your blood? Then why does it show up only under the eyes?! what's the EYE connection? I've had these all my life, since I was very little, but recently they've gotten worse. My mother says they are inherited, but she doesn't seem to have them so badly, they are there, but not as bad as mine. Also, I thought they came from lack of sleep, no? Regards, stars Tweet