Anorexia or Anorexia Nervosa is a type of eating disorder where someone doesn't eat enough food; it is usual linked to low self-esteem and body image. Someone with anorexia will often try extremely hard to keep their body weight low this is usually done by limiting how much they eat, doing much exercise or both. Someone with anorexia will often have 'rules' surrounding food, when they are able to eat food, and what type of food they might eat. Each person might have different rules surrounding eating and food.