When an individual refuses to consume the amount of food and drink required to maintain a healthy body weight, has a distorted body image, and an intense fear of gaining weight, that person has anorexia nervosa. Anorexia is an extremely dangerous eating disorder that can lead to severe dehydration, lowered blood pressure, bone density loss, and fainting among other consequences. Fortunately, most people who grapple with anorexia can beat it with the right combination of physical, psychological, and social therapy.