BDD

Does this sound like you?

"Body dysmorphic disorder (BDD) (previously known as dysmorphophobia[1] is sometimes referred to as body dysmorphia or dysmorphic syndrome[2]) is a (psychological) somatoform disorder in which the affected person is excessively concerned about and preoccupied by a perceived defect in his or her physical features"

I see this in people who lose so much weight and no matter how much weight they lose, they still don't think they look good. Or guys who can never get big enough.