Dark circles below your eyes once signified an all-nighter of studying or partying, but as you get older, it may seem that these hallmarks of exhaustion never leave, even when you're well-rested. During the aging process, the already-thin skin below your eyes becomes even thinner, showing the blood vessels below and giving you under-eye circles.
The answer isn't just caking on concealer; too much makeup in this area will look lumped on. Instead, use a light foundation -- lighter than the shade on the rest of your face -- or a on the dark areas under your eyes. Use powder to blend it in and set it.
Aging causes water retention in the area under eyes, much like a lack of sleep and allergies did in younger days. To avoid highlighting those dark circles with puffy eyes, get plenty of sleep and invest in a tightening eye cream for nights.
We're not done with these windows to the soul quite yet.