According to the National Institute of Mental Health, bipolar disorder is a brain disorder that causes unusual shifts in mood, energy, activity levels, and the inability to carry out day-to-day tasks. Symptoms of bipolar disorder are severe; they are different from the normal ups and downs that everyone experiences from time to time. Bipolar disorder symptoms can result in damaged relationships, poor job or school performance, and even suicide. But, bipolar disorder can be treated, and people with this illness can lead full and productive lives.
Types of Bipolar Disorder
There are four basic types of bipolar disorder; all of them involve clear changes in mood, energy, and activity levels. These moods range from periods of extremely “up,” elated, and energized behavior (known as manic episodes) to very sad, “down,” or hopeless periods (known as depressive episodes). Less severe manic periods are known as hypomanic episodes.
Bipolar I Disorder
Defined by manic episodes that last at least 7 days, 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 depression and manic symptoms at the same time) are also possible.
Bipolar II Disorder
Defined by a pattern of depressive episodes and hypomanic episodes, but not the full-blown manic episodes described above.
Cyclothymic Disorder (Cyclothymia)
Defined by numerous periods of hypomanic symptoms, as well numerous periods of depressive symptoms, lasting for at least 2 years (1 year in children and adolescents). However, the symptoms do not meet the diagnostic requirements for a hypomanic episode and a depressive episode.
Other Specified, Unspecified Bipolar, and Related Disorders
Defined by bipolar disorder symptoms that do not match the three categories listed above.
Signs and Symptoms
People with bipolar disorder experience periods of unusually intense emotion, changes in sleep patterns and activity levels, and unusual behaviors. These distinct periods are called “mood episodes”. Mood episodes are drastically different from the moods and behaviors that are typical for the person. Extreme changes in energy, activity, and sleep go along with mood episodes.
People having a manic episode may:
- Feel very “up,” “high,” or elated
- Have a lot of energy
- Have increased activity levels
- Feel “jumpy” or “wired”
- Have trouble sleeping
- Become more active than usual
- Talk really fast about a lot of different things
- Be agitated, irritable, or “touchy”
- Feel like their thoughts are going very fast
- Think they can do a lot of things at once
- Do risky things, like spend a lot of money or have reckless sex
People having a depressive episode may:
- Feel very sad, down, empty, or hopeless
- Have very little energy
- Have decreased activity levels
- Have trouble sleeping—too little or too much
- Feel like they can’t enjoy anything
- Feel worried and empty
- Have trouble concentrating
- Forget things a lot
- Eat too much or too little
- Feel tired or “slowed down”
- Think about death or suicide
Read our Bipolar Disorder Fact Sheet or visit the National Institute of Mental Health’s website to learn more about Bipolar Disorder.
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