There is no way to prevent anorexia nervosa. It's helpful to detect the problem as early as possible, so it's important for parents and health care professionals to be aware of the issue.
The first goal is to make sure the person with anorexia nervosa is not in danger. Treatment should correct any problems with body fluids and salts, and doctors should make sure the heart, liver and kidneys are functioning. Hospitalization may be necessary in the most severe cases.