I agree with nikkubus' post ^- check for mites or parasites. Another thing that causes bad sheds sometimes is feeding a snake while they're in shed, because both digestion & shedding requires (uses) more water from the snake's body, & some snakes don't "multi-task" very well, so either they have a bad shed, or they regurgitate their meal...BUT, from your post, it doesn't even sound like you fed this snake in shed? So something is "off".