Bipolar disorder is a mental health condition marked by extreme shifts in mood.
Key symptoms include:
- episodes of mania, or an extremely elevated mood
- episodes of depression, or a low mood
Older terms for bipolar disorder include manic depression and bipolar disease.
Bipolar disorder isn’t a rare condition. In fact, the National Institute of Mental HealthTrusted Source says that 2.8 percent of U.S. adults — or about 5 million people — have a bipolar disorder diagnosis.