I over-rotated a little last night at TKD and got nailed in the kidney area by a hard back kick. We were doing drills, not fighting so the kick was pretty solid and I wasn't trying to avoid it. The "kicker" was 6'3" and 180 lbs. and known for his strong back kick. The guy felt really bad but it was my fault. I didn't feel too bad after I "walked it off" but by 9pm I was in quite a bit of pain. Then it kinda subsided and then woke me up at about 3am. Now it just hurts all the time. I'm hoping it's just some kind of muscle damage but it sure feels weird. I googled it and now I'm sure I'm gonna die.(jk) I'm getting too old for this crap. Anyone ever have a bruised kidney? How long does it last?