Numbness after banging finger
When I started framing I bought a nice shiny fiberglass handled Craftsman rip-claw hammer, a big whoppin' 16oz smooth-faced hammer. After a couple weeks of torment from the guys on the crew, plus a half dozen smashed digits I went out and got a wood handled milled faced Vaughan California framing hammer. The good thing was that the glancing blows and flying nails were pretty much over, but the first time I got myself with that fresh raw milling on the face I just about tore half my thumb off, plus had the pain of smashing it with a full-on strike.
Recently I've developed carpal tunnel-esque symptoms from using hammers, trowels, etc... that never were there when I was a full-time carpenter. I've never had numbness last more than a couple days from smashing my fingers though...