How you get dark circles

Dark circles are caused by one of three primary reasons. Here's the quick and dirty on which solution works best for each type.

- Bone structure. If you have deep-set eyes, shadowing contributes to the dark color under the eyes. Your best bet: camouflage. Look for concealers with yellow undertones, which counteract the bluish cast to under-eye circles.

- Pigmentation. Genetic hyper-pigmentation is the most treatable form of dark circles. Your best bet: Try a lightening cream or talk to a dermatologist about chemical peels or laser resurfacing.

- Vasculature inflammation. Late nights, allergies and nutritional deficiencies can enlarge the blood vessels beneath the thin under-eye skin. Your best bet: Take care of yourself! Sounds cliché but drink that water, get your beauty sleep, eat a healthy diet and avoid cigarette smoke (easy enough, right?).