According to Wikipedia, Anorexia nervosa is a psychiatric illness that describes an eating disorder, characterized by extreme low body weight and body image distortion, with an obsessive fear of gaining weight. Here’re few health risks associated with Anorexia Nervosa:

• Lowered blood pressure and pulse
• Brittle hair and nails
• Lightheadedness or fainting
• Swollen joints
• Low temperature
• Loss of hair on the head
• Depression
• Lanugo – the growth of soft furry hair on the face, back and arms
• Slow or stunted growth
• Menstrual periods stop