Binge-eating behaviors may also occur in individuals who have the eating disorder bulimia nervosa. Yet binge-eating disorder is distinct from bulimia nervosa, because people with bulimia often perform some activity to keep from gaining weight after they overeat. They may purge by vomiting or using diuretics; they may fast, not eating for long periods of time; or they exercise strenuously. Individuals with binge-eating disorder do not engage in these behaviors after a binge and thus tend to gain weight as a result of the condition.