I share your problem.. my hands are constantly getting cut and bashed. I hate it soooooo much when people ask you to carry large heavy and awkwardly shaped boxes places and it really hurts and you can feel your hands getting worse as you carry it. My only solution is to refuse to carry things, and to try to keep my nails at a good length so they don't get pulled or snap.
I hate playong when I get a cut, especially on the thumb, on the exact place where the thumb connects with the key, trying to do octaves is really painful and it really effects my practising. That is my problem with my hands, but I can't seem to help getting cuts, maybe it's just one of those things in life that are there to pester us