When I was playing street hockey a few years ago, the edge of another player's stick caught me less than half an inch below my left eye, resulting in a quick trip to Emergency and a few stitches. (Not being a full-time idiot, I now wear squash goggles when I play.) When I went to my doctor to have the stitches removed a week or so later, he took one look at them and said, "Ooh, looks like someone's been practicing their plastic surgery stitching." I was glad they did because there's no detectable scar there now.

Many other people aren't so lucky, so scar management has become a booming business.

Note, too, that a new sense of this phrase has emerged recently: "Therapy or other treatments that help people deal with the emotional scars caused by the terrorist attacks of September 11, 2001." So far I've only seen one citation for this new sense.