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Obsessive-Compulsive DisorderEssay Preview: Obsessive-Compulsive DisorderReport this essayObsessive-Compulsive DisorderObsessive-Compulsive Disorder (OCD) is a mental illness that traps people in endless cycles of repetitive thoughts and behaviors and must repeat certain actions over and over to relieve that stress or to obtain from danger. Pierre Janet described obsessive-compulsive disorder by using the term psychasthenia. Sigmund Freud described.