Perhaps you had a late night, aren't feeling well, or simply were unlucky enough, like this writer, to inherit dark circles under the eyes.
Concealer can hide those circles, but unfortunately many women use a shade that's much too light for their skin tone. This results in the appearance of white circles around your eyes, and the look is much more obvious in photographs. Your concealer should be no more than one shade lighter than your skin. Makeup experts suggest applying it to well-moisturized skin with one finger, which helps soften it, and then topping it with a thin layer of foundation to blend in with the rest of your skin. Another tip is to avoid concealer with zinc in it, which will accentuate the "white ring" look.