Cyclothymia is a mood disorder characterized by cycling periods of hypomania-unusual emotional highs-and periods of mild to moderate depression. The condition is similar to the better known bipolar disorder, but cyclothymics never experience episodes of full mania or deep depression. In order for a therapist to diagnose someone with cyclothymia, the cycling of moods must continue for at least two years. Since the emotional episodes of cyclothymics tend to be more mild, they often go undiagnosed and untreated. Clinical studies have demonstrated, though, that leaving these symptoms untreated...