I have dark cicles too - it can be a sign of dehydration, kidney/liver toxicity, not enough iron/B12... or it could be that you're underyes are hollow (like mine) and thusly have thinner skin that shows all the icky bloodvessels. If you have puffy bags and cirles, then it's time to start some interal cleansing, because it's a sign your body is congested :)