acnorexic
An instance when one believes they possess acne/bad skin. They may or may not at one point in time, but they always come to a point where they believe they have the acne that they don't. They become obsessed over something that isn't even there.
Sam looked in the mirror and complained about her skin - she was acnorexic.
Sam was acnorexic for her skin was as glowing as could be.
Sam was acnorexic for her skin was as glowing as could be.