Bipolar disorder is a disorder associated with episodes of mood swings ranging from depressive lows to manic highs.

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The exact cause of bipolar disorder is not known, but a combination of genetics, environment, and altered brain structure and chemistry may play a role.

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Manic episodes may include symptoms such as high energy, reduced need for sleep, and loss of touch with reality. Depressive episodes may include symptoms such as low energy, low motivation, and loss of interest in daily activities. Mood episodes last days to months at a time and may also be associated with suicidal thoughts.

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Treatment is usually lifelong and often involves a combination of medications and psychotherapy.

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Common diagnosis- More than 3million US cases per year.