Those of you who play soccer or do a lot of running likely have experienced a blue toenail or two. You know what I mean- your toenail turns dark blue and thick, and stays like that for months until it eventually falls off, revealing a new, flimsy nail underneath. Back when I was playing on two soccer teams and running marathons (oh, the salad days), I typically had at least two blue toenails at any given time, to the point where I was too ashamed to get a pedicure because I didn't want to expose anyone else to my Halloween feet. I also once dropped a padlock on my toe, and even though it was years ago, the nail has never fully recovered- it's still thicker than normal and light blue at the base. If I'm ever captured by enemy forces and tortured, I hope that they'd rip out my toenails (as opposed to waterboarding or what have you) because, hey, they could use a fresh start.
Little did I know that there was a home remedy to blue toenails, until Eri pointed me to this thread on a triathelete blog. After giving it a read, I think I'm quite happy to leave my remaining blue toenail in peace.