anorexia

A "mental disease" according to most people. Mental diseases like that don't exist - it's NOT a disease. Diseases aren't self-induced and it is self-induced. Anorexia is the phenomenon where someone who is ridiculously sadistically self-conscious looks at a barbie doll and decides that they're too fat. From that point on, they see themselves only as fat and misjudge.

Judy decided that anorexia was the only way out of her skin (which was half-starved already).