You know that dry skin you get around your heel?
Here’s a piece of advice. Don’t fuck with it.
I was bored and peeled some off. It started to bleed. I went wandering around a science fiction convention wearing sandals.
My heel now hurts like a bitch and God only knows what crawled into it from the environs of said science fiction conventions’ floor as I strolled around.
So now I am wearing one sock (with my sandals – how chic!) and keeping a close eye on the boo-boo heel, hoping it will heal up without any major infection.
Don’t you hate being in pain and knowing it’s your own fucking stupid fault?
Thoughts from a Fat Old Lady 
I get the cracky heels all the time, and used to peel them bloody regularly. I’ve found that sleeping with a good coat of vaseline and socks for a few nights keeps them from peeling and helps them heal up faster.