Anxiety is a natural human emotion; everyone feels anxious or worried at times. We are all familiar with preschoolers who are frightened by the dark, have a variety of bedtime rituals and can get anxious at times of separation from a parent. However, a youngster who experiences anxiety more strongly and more readily than others and worries excessively to a degree that interferes with his or her life may have an Anxiety Disorder. Anxiety in children and teenagers can arise because of separation, fears, something catastrophic happening, being judged, worrying about things before they happen, getting a perfect score on a test, being in school or in social situations. Anxiety Disorders are among the most common mental health problems affecting children and teenagers and are among the most effectively treated.