There are several types of bipolar disorder, depending on the nature of the illness. Bipolar II disorder Individuals have at least one depressive episode and at least one hypo manic episode, but never experience a full manic or mixed mood episode. Bipolar II can go unrecognized because the hypo manic symptoms may not appear that unusual. Cyclothymic disorder Individuals have suffered numerous hypo manic and depressive symptoms over at least 2 years that are not severe enough or not long enough in duration to meet the criteria for a mood episode. This is the same as rapid cycling, only the cycles are more frequent.
Some individuals have predictable seasonal patterns to the onset of their mood episodes.
Post-partum onset When the mood disturbance occurs within 4 weeks of childbirth. ICQ Inc. All Rights Reserved.