If the dark circles under your eyes evoke images of boxing matches, it may be time to take things a bit slower and get more sleep. Note, however, that it could be more serious. An underactive thyroid, or a sensitivity to certain foods, could be to blame.
If you are sleeping well, but still have circles under your eyes, consider eliminating possible food triggers from your diet. Start with wheat and then with cow's milk – these are common culprits. Also cut down on your salt and alcohol intake and drink at least eight glasses of water per day. If the problem persists, pay a visit to your doctor.
Read more about thyroid problems and diet.