Anorexia Nervosa: Causes, Symptoms, & Treatments What is Anorexia Nervosa? At its most basic, anorexia nervosa is mental disorder characterized by an obsessive desire to lose weight. In fact, individuals suffering from anorexia often greatly fear gaining weight, even if they are already weigh less than their physician would consider healthy or safe. As such, anorexia sufferers hold distorted body images about themselves (e.g. they feel fat when they’re actually very thin), which is what pushes them continue losing weight. In order to force their bodies to do this, individuals suffering from anorexia can employ a variety of methods, including excessive calorie restriction or exercise, vomiting (also known as purging), as well as the use of laxatives or diuretics. In most cases, individuals with anorexia can’t control this behavior, even when It becomes life-threatening. What Are Some Signs or Symptoms of Anorexia? Unlike many other mental conditions, the onset o...