Eating disorders are psychological conditions that seriously affect the body, most commonly affecting teenagers and girls. The main eating disorders are bulimia nervosa, anorexia nervosa, and binge eating disorder. The causes of eating disorders are often emotional and personality problems related to stress, family pressure, low self-esteem, poor body image, depression, and difficulty expressing feelings. Bulimia is characterized by binge eating followed by purging, while anorexia involves excessive weight loss and fear of gaining weight. Statistics show that 0.5-3.7% of females will experience anorexia and 1.1-4.2% will experience bulimia in their lifetimes.