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Obsessive–compulsive disorder

Obsessive–compulsive disorder (OCD) is a mental disorder in which an individual has intrusive thoughts and feels the need to perform certain behaviors (compulsions) repeatedly to relieve the distress caused by the obsession, to the extent where it impairs general function. OCD has been described since antiquity and has affected numerous notable historical and contemporary figures; understandings of it were historically rooted in religion and beliefs about demonic possession.

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