What Is Bipolar Disorder?

Bipolar I disorder is defined by manic episodes that last at least 7 days (most of the day, nearly every day) or by manic symptoms that are so severe that the person needs immediate hospital care. Usually, depressive episodes occur as well, typically lasting at least 2 weeks. Episodes of depression with mixed features (having depressive symptoms and manic symptoms at the same time) are also possible.Bipolar II disorder is defined by a pattern of depressive episodes and hypomanic episodes, but the episodes are less severe than the manic episodes in bipolar I disorder.also called cyclothymia) is defined by recurrent hypomanic and depressive symptoms that are not intense enough or do not last long enough to qualify as hypomanic or depressive episodes.Bipolar disorder is typically diagnosed during late adolescence (teen years) or early adulthood. Occasionally, bipolar symptoms can appear in children. Although the symptoms may vary over time, bipolar disorder usually requires lifelong treatment. Following a prescribed treatment plan can help people manage their symptoms and improve their quality of life.Mood episodes are very different from the moods and behaviors that are typical for the person. During an episode, the symptoms last every day for most of the day. Episodes may also last for longer periods, such as several days or weeks.A person may have bipolar disorder even if their symptoms are less extreme. For example, some people with bipolar II disorder experience hypomania, a less severe form of mania. During a hypomanic episode, a person may feel very good, be able to get things done, and keep up with day-to-day life. The person may not feel that anything is wrong, but family and friends may recognize the changes in mood or activity levels as possible bipolar disorder. Without proper treatment, people with hypomania can develop severe mania or depression.
https://www.nimh.nih.gov/health/topics/bipolar-disorder