Overhead lighting puts shadows in your eye sockets and under your nose, and it reads as 'tired' even when you weren't. This is why office headshots look bad. The fix at capture time is to get the light lower or bounce something off a white wall, but if the photo already exists a tool built for faces will even it out. Just don't overdo it or the face goes flat and loses all its structure.
Overhead lighting puts shadows in your eye sockets and under your nose, and it reads as 'tired' even when you weren't. This is why office headshots look bad. The fix at capture time is to get the light lower or bounce something off a white wall, but if the photo already exists a tool built for faces will even it out. Just don't overdo it or the face goes flat and loses all its structure.