Late, stressful nights often reveal themselves in the form of tired-looking eyes with dark circles underneath. But contrary to popular belief, pulling all-nighters is not the only reason for our under-eye woes. The first step to treating dark circles is identifying the main cause; and only then can they be effectively prevented. Click through the slideshow to determine what may be causing your dark circles and how you can effectively combat them.
Homepage image: Photographed by Mario Testino, Vogue, May 2007