I think it can be caused by a variety of conditions such as a genetic abnormality, an issue during development, or a trauma such a inexperienced person trying to pop the snake.Originally Posted by randomdaydream
Usually there isn't anything that can be done about it, but quite often the snake won't have any problems.
Oh, and good advice about the vet.Pet store employees as well as forum junkies can only guess, but a vet would be the best person to make a determination and prescribe treatment if needed.