I/ve had a couple burns, but never been to the hospital/doctor for them. I have two tied for my worst though. Recently, i was working on a piece of .5 in. bar stock, and dropped it into my shoe after pulling it out of the forge. Big burn on my left foot, left a nice scar though. My other was just when i started blacksmithing, pulled away a piece of metal, and had red coal fall out of the tongs. Stupid me, not thinking, went to catch it between the anvil stand with my leg. About 5mm deep and 3 in. square.