splinter in foot?

recently, i noticed an extremely sore area under my little toe on one of my feet. at first, i just left it alone, thinking that it was just a callous or something trivial. but then it started to hurt alot, and it was even painful to walk. the skin there was tough, like a callous, but there was like a hard raised circle in the middle. i was looking at it today and i used tweezers and a razor blade and i pulled the circle thing out, and it looked like my own skin had made a splinter into my foot. after i got it out, my foot bled ALOT from that area, but only for a little while. it was weird, but now it hardly hurts at all and i can walk fine. i put peroxide over the hole that was left in my foot, and i also put some neosporin over it. so, was there a splinter in my foot that my skin hardened around or what?