anorexia nervosa, a disorder characterized by a prolonged refusal to eat, resulting in emaciation, amenorrhea, emotional disturbance concerning body image, and fear of becoming obese. The condition is seen primarily in adolescents, predominantly in girls, and is usually associated with emotional stress or conflict, such as anxiety, irritation, anger, and fear, which may accompany a major change in the person’s life. Treatment consists of measures to improve nourishment, followed by therapy to overcome the underlying emotional conflicts.