Anorexia Nervosa:

A serious, potentially life-threatening eating disorder characterized by self-starvation, excessive weight loss and loss of menstruation due to low body-fat content
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Bulimia Nervosa:

A serious, potentially life-threatening eating disorder characterized by a cycle of binge-eating and then compensating for it with behaviors like self-induced vomiting, abusing laxatives or diuretics, and/or excessive exercise.
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Eating Disorder Not Otherwise Specified:

An eating disorder that does not meet the specific criteria for bulimia nervosa or anorexia nervosa but is still harmful.
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Compulsive Exercise:

Not a formal diagnosis. This behavior is usually a symptom of anorexia nervosa, bulimia nervosa or an eating disorder not otherwise specified.
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