Bipolar disorder, sometimes called bipolar depression,
is a serious illness. It can make a person’s normal moods
seem extreme. It used to be called manic depression.
People with bipolar disorder have mood swings. Their moods can
swing from very low (depression) to very high (mania). Bipolar
disorder sometimes is confused with other types of depression.
Bipolar disorder is a lifelong illness. But today there are many
treatments. People with bipolar disorder should ask their healthcare
provider about the best way to keep their moods from swinging
too far one way or the other.
source: bipolar.com