I've damaged both my big toenails doing taekwon do, had the right foot one removed. I don't remember it hurting very much at all, this was 20 odd years ago though.
It did grow back, but only the first few mm of it are living, the rest is just like a horrible yellow full-sized toe-end (doctor said nothing to be done).
). Lost middle toe and big toe nails on one foot as well
. They grew back fine though was just tender for many months/trying to battle athletes foot growing on the bare nail bed
.
