Anxiety disorders, such as phobias, panic disorder, and obsessive-compulsive disorder are the most common group of mental illnesses in the United States. Recent studies suggest eight percent of U.S. teenagers suffer from an anxiety disorder. This informative title examines different anxiety disorders, including their causes, symptoms, effects, and treatment options. A chapter on caring for others discusses how anxiety and phobias affect young people with siblings and parents who have the disorder.