What is the difference between anorexia and the rumination syndrome?

Distinct Disorders. Anorexia is an eating disorder characterized by an irrational fear of gaining weight. Rumination syndrome is characterized by effortless regurgitation of most meals following consumption. While anorexics will sometimes induce vomiting, ruminators can vomit without effort. Both disorders can cause significant medical, emotional, and social problems with a better prognosis for ruminators.