Most people with bipolar disorder alternate between long stretches of depression and (hypo)mania. For example, they may have depression for months or years at a time. With rapid cycling bipolar, a person experiences four episodes of mood cycling in one year. This could include any combination of mania, mixed mania, hypomania, or depression. Usually these shifts take place over the course of weeks or months, but some psychiatrists report having patients who can experience shifts lasting just a few days.
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