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What causes insomnia?

Your insomnia could be caused by any number of reasons. Acute insomnia can come and go in periods lasting for up to several weeks and can usually be attributed to a lifestyle change that is related to stress, diet or a recent medical condition. Chronic insomnia is insomnia that persists for longer than a month and can even be lifelong. Psychological disorders or a state of hyperarousal can also cause paradoxical insomnia that may occur for seemingly no reason at all.