There are two main types of anorexia nervosa:
Restricting Type Anorexia Nervosa occurs when the primary method of weight loss involves dieting, fasting, and excessive exercising—and not engaging in any bingeing or purging behaviors for at least a three-month period.
Binge Eating/Purging Type Anorexia Nervosa occurs when the individual has engaged in episodes of bingeing or purging behavior, such as self-induced vomiting, misuse of laxatives, diuretics, or enemas.