Obsessive Compulsive Disorder (OCD) is characterized by obsessions, compulsions, or both. Obsessions are intrusive thoughts, urges, or images that cause significant distress to an individual. Compulsions are behaviors (including mental behaviors) that the individual engages in to decrease the distress caused by obsessions. These symptoms must cause a high level of distress, impairment in functioning (social, occupational, or other important areas), or consume at least 1 hour per day.