Anorexia nervosa is a psychological condition and an eating disorder in which the individual loses more weight than is healthy for their height and age. The individual will maintain a body weight of 85 percent or less of their expected weight.
A person with anorexia will intentionally restrict their food intake, generally due to a fear of being or becoming fat, even when their body mass index (BMI) is already low. They may also practice excessive exercise, use laxatives, and vomit to reduce weight, but to a lesser extent than those diagnosed with bulimia.
Complications can be severe. Eating disorders are reported to have the highest mortality rate of any mental illness.
Treatment includes hospitalization and counseling.