What sort of problem is anorexia nervosa?

Body image: People with anorexia nervosa have an inappropriate body image i.e. Dispite being at normal or even a low, unhealthy weight they continue to see themselves as being overweight or obese. Treatment includes therapy to change this image issue and may include inpatient hospital care.

Emotional/physical: Usually females; usually after puberty. Morbid fear of weight gain, abn body image ("i'm fat", even if severely underweight); restrictive intake (semi-starvation); often lose menses; can have a variety of symptoms including feeling cold (no fat stores), apathy/anger, hair thinning, fine hair growth (lanugo); risk for bone loss, relationship problems. Can be w/purging (bulimia), related but diff.