**winces** You lost your big toe nail?
That must have hurt like a bugger!
If I was in your position, I think I'd buy a new pair of running shoes a size bigger than the ones I normally wore before I had the nail problem. And make sure I laced them up nice and tight. That way there'd be no bumping or rubbing between my toes and the inside of the shoe.
And maybe make sure I was running in decent trail shoes with toughened toes to make sure tripping over roots or stones didn't bump the nail through the shoes either. Or is it just a hilly road race you're running?
I never lost a nail yet, but I did have a horrible blister that took up the whole end of my 2nd toe, and a bruise under the nail. It's healed now, but the nail is still extra sensitive to bumps and the new skin is very quick to blister up again.
Edited: 04/08/2012 at 18:36