Even if you just got a new haircut and lost 10 pounds, if your eyes look exhausted, that's all anybody will notice. "More than any other facial feature, your eyes reveal the most about how you feel," says Austin, Texas, dermatologist Gregory Nikolaidis, MD.
But sometimes your eyes look tired even when you're not. Dr. Nikolaidis says his patients regularly complain about puffy, swollen eyes and dark circles that won't go away. While lack of sleep is the most obvious cause, allergies, hormonal shifts, genetics, and diet all play a part, as well.
Here's the good news: There are plenty of ways to perk up your peepers—and fast. Try these tricks to soothe, de-puff, and diminish circles. And don't forget to get a good night's sleep.