31+ Eating Disorder Motivation Quotes. Doctors recognize five diagnostic categories. Thank you, {{form.email}}, for signing up. Advertisement eating disorders are a devastating mental illness. People with eating disorders develop them for different reasons. Eating disorders are more prevalent in those who have diabetes than those without. Eating disorders encompass a wide range of behaviors and attitudes towards food. Howstuffworks.com contributors there isn't a clear understanding of what causes eating disorders. Find out everything you need to know about parenting. Thank you, {{form.email}}, for signing up. Parents.com parents may receive compensation when you click through and purchase from links contained on this website.