Since the above was not to your satisfaction:
From Go Ask Alice
Besides allergies, it's possible that genetics, the nature of the skin beneath the eyes, water intake, and/or age could contribute to your so-called "raccoon" look. Pronounced undereye circles are often passed down, genetically, within families. Another likely culprit is the skin directly under the eyes, which is just about the thinnest skin you can find on your body. It is extremely sensitive, as well as prone to this sort of "discoloration." Rubbing your eyes excessively can make the dark circles worse. Dehydration can also make the circles more obvious. If you normally don't drink much water, perhaps you can add a few more glasses to your daily liquid intake. Lastly, don't forget about ol' Father Time -- undereye circles tend to become more pronounced with each passing year.
Still not satisfied, try Google
Some people come into our lives and quickly go, others stay awhile. Either way, they leave footprints on our hearts and we are never the same. May my footprints always be gentle on your heart.