Anorexia
Anorexia nervosa is a psychiatric condition, which is part of a group of eating disorders. The cause of anorexia has not been definitely established, but self-esteem and body-image issues, societal pressures, and genetic factors likely play a role. Anorexia affects female more than males. It is the most common in adolescent females. Anorexia tends to affect the middle and upper socioeconomic classes than less advantaged classes and ethnic minorities in the United States. The disorder affects about 1% of adolescent girls and about 0.3% of males in the U.S.