One of the main signs of anorexia is not eating enough food. You may not eat because you think you will look perfect if you lose a lot of weight. But if you starve, you can get seriously ill or even lead to death, so you need help. Anorexia is an eating disorder and a serious mental condition.
Peer pressure, concern for slenderness and beauty, gaining autonomy, identity conflicts, and the slippery slope of weight loss are plausible social factors that many experts believe contribute to anorexia nervosa. The exact cause of anorexia is not known.
Atypical anorexia nervosa is a subtype of other specific eating or eating disorders (OSFED). A person with atypical anorexia nervosa will meet all criteria for anorexia nervosa; however, despite significant weight loss, the person's weight is within or above the normal BMI range.