I haven’t had surgery since I was 6, and that was for something relatively minor, so I guess I’m lucky.
I’ve got the standard appendix jobbie, the childhood crack on the chin (hiding a bit aft of my goatee), and a completely unearned — now faint — horizontal scar high on my cheeckbone, uner my left eye. Got that one from a buddy who decided to do his Arnold Palmer shtick at the mini golf with me standing behind and to his right.
We were both 7, IIRC, maybe 8. Not like he couldn’t READ all of those signs “PLEASE, DO NOT SWING YOUR PUTTER ABOVE YOUR KNEES”.