Bipolar disorder is also commonly known as manic depression or manic-depressive disorder. It is a long-term mental disorder that causes people to cycle between different moods and energy levels.
These shifts in mood tend to range from feelings of being extremely happy and elated with a lot of energy and feelings of being down and depressed. These are known as manic episodes and depressive episodes respectively.
Hypomania is a period of feeling "up" that is less extreme than standard manic episodes.
Symptoms of bipolar disorder