Eating disorders arise from low self-esteem, depression and an inability to cope with emotions. The three main types of eating disorders are anorexia nervosa, where people restrict food intake and fear any weight gain; bulimia nervosa, where people go through periods of stopping eating; and compulsive overeating, where people use food to relieve stress and depression. Left untreated, anorexia and bulimia can result in death, so those with eating disorders need understanding and help to overcome their illness.