Anorexia nervosa (say "an-uh-RECK-see-uh nur-VOH-suh") is a type of eating disorder. People who have anorexia have an intense fear of gaining weight. They severely limit the amount of food they eat and can become dangerously thin.

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Anorexia: The Body Neglected

WebMD Feature

Anorexia nervosa takes an enormous toll on the body. But that's not all. It has the highest death rate of any mental illness. Between 5% and 20% of people who develop the disease eventually die from it.

What happens exactly? Here's a look at what anorexia does to the human body.

The first victim of anorexia is often the bones. The disease usually develops in adolescence -- right at the time when young people are supposed to be putting down the critical bone mass that will sustain them through adulthood.

But the most life-threatening damage is usually the havoc wreaked on the heart. As the body loses muscle mass, it loses heart muscle at a preferential rate -- so the heart gets smaller and weaker. "It gets worse at increasing your circulation in response to exercise, and your pulse and your blood pressure get lower," says Mickley. "The cardiac tolls are acute and significant, and set in quickly." Heart damage, which ultimately killed singer Karen Carpenter, is the most common reason for hospitalization in most people with anorexia.

Read more about complications of anorexia
Related to Anorexia

* anorexia symptoms,
* anorexia treatment,
* eating disorders in teens,
* bulimia,
* binge eating disorder,
* female athlete triad,
* anorexia complications,
* antidepressants,
* body image,
* missed periods,
* osteoporosis

Anorexia affects both the body and the mind. It may start as dieting, but it gets out of control. You think about food, dieting, and weight all the time. You have a distorted body image. Other people say you are too thin, but when you look in the mirror, you see a fat person.

Anorexia usually starts in the teen years. Early treatment can be very effective. But if not treated early, anorexia can become a lifelong problem. Untreated anorexia can lead to starvation and serious health problems, such as bone thinning (osteoporosis), kidney damage, and heart problems. Some people die from these problems.

If you or someone you know has anorexia, get help right away. The longer this problem goes on, the harder it is to overcome. With treatment, a person with anorexia can feel better and stay at a healthy weight.
What causes anorexia?

Eating disorders are complex, and experts don't really know what causes them. But they may be due to a mix of family history, social factors, and personality traits. You may be more likely to have anorexia if:

* Other people in your family have an eating disorder, such as anorexia or bulimia nervosa.
* You have a job or do a sport that stresses body size, such as ballet, modeling, or gymnastics.
* You are the type of person who tries to be perfect all the time, never feels good enough, or worries a lot.
* You are dealing with stressful life events, such as divorce, moving to a new town or school, or losing a loved one.

Anorexia affects less than 1% of the population. It is most common in:

* Teens. Like other eating disorders, anorexia usually starts in the teen years with strict dieting and rapid weight loss. But it can start even earlier or in adulthood.
* Women. About 9 out of 10 people with anorexia are female. But some boys and men have it too.1

Many people who have anorexia are white and come from wealthy families. But it can happen to anyone.
What are the symptoms?

People who have anorexia often strongly deny that they have a problem. They do not see or believe that they do. It is usually up to their loved ones to get help for them. If you are worried about someone, you can look for certain signs.