Anorexia nervosa or anorexia is a disease that has a very high mortality rate and causes sufferers to have abnormally low body weight. This is a complex and potentially devastating eating disorder wherein an irrational fear of weight gain and an abnormally low body weight. The causes of anorexia are controversial, but appear to be a combination of biological, psychological, and social factors. Here are the other things to know more about anorexia: Anorexia can have a genetic component, and eating disorders tend to run in families. Environmental factors such as media pressure to be thin, peer pressure, trauma, and abuse can contribute to anorexia.Read More →