My guitar-induced injuries didn't happen overnight, but they're as debilitating as if I'd broken a bone or had a bad cut. Just plain old osteoarthritis in my chording hand, that's so bad some days that I can't even play a normal C or F chord without looking at my fingers to make sure they go where they're supposed to.   Shaking my hand out and stretching and warming up (for a half hour or so) helps a lot, but with old "Arthur" some days the equipment just doesn't want to function as desired.
I'm fortunate not to have developed carpal tunnel syndrome, but I guess there are several of these "occupational hazards" for guitar players.


I've also had a guitar string snap and hit me in the face, but never any real injury from that.