Anorexia: It's a mental illness. Self-starvation and extreme weight loss are symptoms, however, Anorexia is not about food, it goes much deeper. If Anorexia were just a diet, or a choice, it would be easy to "just eat something". Anorexia Nervosa is not a diet, a phase, or a choice; the sufferer is not in control. Professional psychological and medical treatment should be sought immediately.