Obsessive-Compulsive Disorder (OCD) is a common, chronic, and long-lasting disorder in which a person has uncontrollable, reoccurring thoughts (obsessions) and/or behaviors (compulsions) that he or she feels the urge to repeat over and over. OCD is a mental disorder in which a person has certain thoughts repeatedly (called “obsessions”) or feels the need to perform certain routines repeatedly (called “compulsions”) to an extent which generates distress or impairs general functioning.