Cyclothymic disorder and bipolar disorder are both mental illnesses.
Cyclothymia is a mood disorder that consists of recurrent mood disturbances between hypomania and mile depression. A single episode of hypomania is sufficient to diagnose cyclothymic disorder though most individuals who are diagnosed also have periods of mild depression. The diagnosis of cyclothymic disorder is not made when there is a history of mania or major depressive episode or mixed episode. Cyclothymia appears equally in men and women, though women more often seek treatment. Unlike some forms of bipolar disorder, people with cyclothymia are almost always fully functioning; sometimes even hyper-productive.
Cyclothymia, a mood disorder most often treated with counseling, is not a death sentence, and most people diagnosed with it actually can be very productive. Medical professionals who help treat this disease usually carry a masters in clinical mental health counseling due to the strong emphasis on counseling, and the effectiveness of counseling on this specific disease