Cyclothymia is a chronic bipolar disorder consisting of short periods of mild depression and short periods of hypomania (lasting a few days to a few weeks), separated by short periods of normal mood. Individuals with cyclothymia (thymia: from the Greek word for the mind) are never free of symptoms of either depression or hypomania for more than two months at a time. In 1980 the classification of cyclothymia was changed in the DSM-IV from Personality Disorder to Mood Disorder.

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