I restrung my acoustic with heavier strings (14-59s) in a quest for more hand strength, and to hopefully fix some fret buzz it had been getting. The good news is that the fret buzz cleared right up. But, hours after changing the strings, I went out busking for a couple hours. I made thirteen bucks, but when I was done, I looked down at my hand and saw some blood splattered on my right thumb. Turns out I'd somehow peeled a full centimeter of skin off of my right ring finger while playing. My best guess as to what happened is that I'd been strumming a bit harder to accommodate the heavier strings, and my finger was catching the strings as well as my pick, and because it was a little cold, I'd lost enough feeling in my hand to not notice it. But fear not; with a band-aid on, I'm good as new.