What is bipolar type I disorder?

Bipolar disorder is a mental condition classified by episodes of mania, hypomania, and depression. It’s commonly divided into two subtypes: bipolar type I and bipolar type II. Bipolar type I (BP1) is when a person has had at least one manic episode (a period of high or irritable mood). In cases of bipolar type II, the person has experienced hypomania and depression, but never a full manic episode.

People living with bipolar disorder are frequently misdiagnosed with depression. This misdiagnosis happens because depression is the most frequent initial presentation of bipolar disorder, and because a person is more likely to speak to a clinician about their symptoms when they’re depressed. The first signs of mania or hypomania can also be misunderstood as hormonal changes or “teenage moodiness” when emerging during young adulthood. Unfortunately, it can take an average of six to ten years for a person with bipolar disorder to receive a correct diagnosis and proper management for their illness, and many still remain undiagnosed.