I'm literally speechless (and I never shut up). Deformity? You're not the Phantom of the F**king Opera, Bex, you've got a lump on your chest. Grow up. Seriously - that's what you need to do. Grow up. Your body is going to change throughout your life and you have to deal with it. Everyone hates it. Everyone wants to look like they did when they were 21 and you've either got to accept you don't or spend the rest of your life being an insufferable, whining, miserable old bag.
For the sake of your poor child stop acting like your entire self worth is defined by a minor scar. What kind of lesson does that teach him? Because you're certainly teaching him a lot, Bex, but nothing actually educational.