Eating disorders frequently appear during adolescence or young adulthood, but some reports indicate that they can develop during childhood or later in adulthood. Women and girls are much more likely than males to develop an eating disorder. Men and boys account for an estimated 5 to 15 percent of patients with anorexia or bulimia and an estimated 35 percent of those with binge-eating disorder. Eating disorders are real, treatable medical illnesses with complex underlying psychological and biological causes.

Eating disorders are more common in cultures focused on weight loss and body image. Body dissatisfaction and dieting may lead to unhealthy and dangerous eating behaviors. Sometimes, these eating patterns can lead to eating disorders. Fortunately, there has been an increased awareness about these types of illnesses. Eating disorders are treatable.

Anorexia can slow the heart rate and lower blood pressure, increasing the chance of heart failure. Those who use drugs to stimulate vomiting, bowel movements, or urination are also at high risk for heart failure. Starvation can also lead to heart failure, as well as damage the brain. Anorexia may also cause hair and nails to grow brittle. Skin may dry out, become yellow, and develop a covering of soft hair called lanugo. Mild anemia, swollen joints, reduced muscle mass, and light-headedness also commonly occur as a consequence of this eating disorder. Severe cases of anorexia can lead to brittle bones that break easily as a result of calcium loss.

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