Bipolar I is characterized by manic episodes lasting about seven days, followed by depressive episodes lasting about 2 weeks. A manic episode is considered a medical emergency and requires immediate medical care as it can cause significant functional impairment and put people at risk of dangerous behaviors.
Bipolar II is characterized by hypomanic episodes (a less severe form of manic episodes) lasting about four days, followed by depressive episodes that last about 2 weeks. People who experience hypomanic episodes can continue to function during the day and can be treated in outpatient settings.
Cyclothymic disorder is characterized by symptoms of hypomania and depressive episodes over two years. Cyclothymic disorder patients also experience emotional highs and lows, but they are shorter and less severe.[1]