Cyclothymia (cyclothymic disorder).

Cyclothymia or cyclothymic disorder is a mood disorder that causes moderate emotional swings. It is a type of bipolar disorder with highs and lows that are not as extreme as those in bipolar I or II. Cyclothymia is frequently misdiagnosed as depression because individuals are more likely to seek help during depressive episodes. However, many avoid seeking treatment because they do not feel it is necessary. Unpredictable mood shifts can interfere with daily functioning. Medications and talk therapy are among treatments available.