Cyclothymia, also known as cyclothymic disorder, depressive-hypomaniac disorder, or Cyclothymic personality disorder, is a mental disorder that involves numerous periods of symptoms of depression and periods of symptoms of hypomania. These symptoms, however, are not sufficient to be a major depressive episode or a hypomanic episode. Symptoms must last for more than one year in children and two years in adults.
The cause of cyclothymia is unknown. Risk factors include a family history of bipolar disorder. Cyclothymia differs from bipolar in that major depression, mania, or hypomania have never occurred.
Treatment is generally with counseling and mood stabilizers such as lithium. It is estimated that 0.4-1% of people have cyclothymia at some point in their life. Onset is typically in late childhood to early adulthood. Males and females are affected equally often.