Bipolar Disorder is a type of mood disorder with marked changes in mood between extreme elation or happiness and severe depression. The periods of elation are termed mania. During this phase, the teenager has an expansive or irritable mood, can become hyperactive and agitated, can get by with very little or no sleep, becomes excessively involved in multiple projects and activities, and has impaired judgment. A teenager may indulge in risk taking behaviors, such as sexual promiscuity and anti-social behaviors. Some teenagers in a manic phase may develop psychotic symptoms (grandiose delusions and hallucinations). For a description of the depressive phase see depression. Bipolar disorder generally occurs before the age of 30 years and may first develop during adolescence.

For additional information see the following Facts for Families:
#38 - Bipolar Disorder (Manic-Depressive Illness) in Teens