I'm not accident- prone...but
Inguinal Hernia from moving a huge Scott's pine in 1996; required surgery.
Wrist injury digging a juniper on collecting trip in SD in 2013; required therapy. Juniper still there.
Nicks and cuts, almost always. But, a few years ago, I was pruning back a huge old cascade Natal Plum; a species I had never worked with before, and I was in a hurry to get it cleaned up. I kept getting "stung" on my non-scissors hand and couldn't place it or figure it out at first. Then I realized those suckers have wicked thorn clusters hidden under the leaves at nearly every petiole. The next day I realized I must be allergic to Natal Plums, because every stab swelled up like a greasy teenager's zits, burning and stinging. It was horrible.