Sure, you protect your face with a layer of sunscreen every morning. But do you reapply? "Remember that sunscreen sweats off, rubs off, and melts in your face, even if the label says 'sweat proof' or 'lasts all day,'" says Jessica Wu, M.D., clinical instructor of dermatology at USC Medical Center.
The fix: Don't worry, we don't expect you to wash your face in the middle of the day and reapply sunscreen. An easy fix is to find a powder with SPF that you can use for touch-ups. While it's ideal to reapply liquid sunscreen, powder formulas will give you some extra protection, Dr. Wu says. And don't think that if you have an indoor job you're immune. Dr. Wu says you can get sun damage just from driving, sitting near a window, or walking across the street.