There are 3 different types of eating disorders. One of these is Anorexia nervosa, this is when a person doesn't eat enough to maintain a healthy body weight.
A second type is Bulimia, this is when a person has uncontrolled eating binges followed by a purge (throwing up the food)
A third type is Binge eating disorder which is the uncontrollable urge to eat large amounts of food.