Obsessive Compulsive Disorder (OCD) affects an estimated 2% of children in the United States and can cause considerable anxiety. OCD is characterized by a pattern of rituals (or compulsions) and obsessive thinking. Common obsessions among children and teens include a fear of dirt or germs, a need for symmetry, order, and precision, and a fear of illness or harm coming to oneself or relatives. Common compulsions include grooming, repeating, and cleaning...