Anorexia Nervosa is classified as an eating disorder. People with Anorexia Nervosa have an obsession with food and are overly concerned with being thin. They are often so terrified of gaining weight that they go to extreme measures to lose weight or maintain a body weight that is below normal for their age and height.
Anorexic individuals restrict the amount of calories they consume, sometimes to the point of self-starvation - or purge by vomiting the small amount of food they do eat. They also use laxatives excessively or over-exercise so that their bodies burn more calories than they eat.
However, Anorexia is more than simply the need to be thin or to restrict food intake. It is often psychologically tied to the lack of control the person may be experiencing in other aspects of their lives. On a subconscious level Anorexic individuals may feel a sense of accomplishment that they have control over something in their life. The constant mental pre-occupation with food and their weight means that mental anguish, or other emotions, are avoided and not dealt with.
People with Anorexia nervosa are often overly sensitive to world issues, and often take the worries of the world onto their shoulders. The strict restriction of food may be used as a measure of how good they are at restraining themselves, taking willpower to an extreme degree. They can see it as a great feat, and inwardly applaud their determination.