I burnt my hand any advice?

Advice I've heard & followed is don't pop it, because that's going to keep it sterile until it pops naturally. And don't freeze it, ice is likely to cause more damage than the burn because you can't even feel the freezing because of the burn damage. Not that I've seen that large boil before. I'm assuming you've kept it cooled after the burn though, one reason I'm not certain how old that burn is.