Cyclothymic Disorder
A chronic fluctuating pattern of hypomanic symptoms and depressive symptoms that do not meet full episode criteria, persisting over an extended period.
Core concept
A chronic fluctuating pattern of hypomanic symptoms and depressive symptoms that do not meet full episode criteria, persisting over an extended period.
Plain explanation
Think of chronic mood fluctuation below full episode thresholds rather than discrete full manic, hypomanic, or major depressive episodes.
Recognition pattern
Notice long-standing instability with repeated periods of hypomanic and depressive symptoms that do not meet full episode criteria.
Development & course
Often begins in adolescence or early adulthood and may be persistent.
Functional impact
Mood variability can disrupt relationships, work, education, and self-understanding even when full episodes are absent.
Associated features
Periods of increased energy and periods of depressive symptoms may alternate.
Differential reasoning
Distinguish from Bipolar II by the absence of qualifying major depressive episodes and hypomanic episodes.
Culture & context
Cultural expectations about temperament and emotional expressiveness should be considered before labeling ordinary variability pathological.
Common misconceptions
Mood variability alone does not equal cyclothymic disorder; chronicity and symptom thresholds matter.
Clinical vignette
A young adult describes years of alternating periods of increased energy and low mood, but no period clearly meets full criteria for a major depressive or hypomanic episode.
Reconsider
Reconsider the formulation if the duration, impairment, developmental pattern, substance/medical context, or competing diagnosis does not fit the core pattern.
Learn
Learn the idea of chronic subthreshold mood fluctuation.
Notice
Ask whether full episodes have actually occurred.
Distinguish
Cyclothymic disorder is about persistent subthreshold fluctuation rather than full episodes.
APA (2022). DSM-5-TR, Bipolar and Related Disorders.