Obesity or any of a category of ailments characterized by psychological and physiological problems related to food intake and defined in the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders (DSM). DSM-defined eating disorders comprise anorexia nervosa, bulimia nervosa, binge-eating disorder, specific variations of these disorders, and specific habits related to them.
Eating disorders are mental disorders defined by abnormal eating habits that negatively affect a person's physical or mental health. They include binge eating disorder where people eat a large amount in a short period of time, anorexia nervosa where people eat very little and thus have a low body weight, bulimia nervosa where people eat a lot and then try to rid themselves of the food, pica where people eat non-food items, rumination disorder where people regurgitate food, avoidant/restrictive food intake disorder where people have a lack of interest in food, and a group of other specified feeding or eating disorders. Anxiety disorders, depression, and substance abuse are common among people with eating disorders. These disorders do not include obesity.