Mere decades ago, bipolar disorder, which is characterized by chronically occurring episodes of mania or hypomania alternating with depression, was considered an uncommon, even rare condition. Reasons why bipolar disease as a condition is often misdiagnosed will be discussed. The etiology, evaluation, prognosis, and management of this debilitating condition will be viewed, and the role of the various members of the health team will be considered. Treatment involving pharmacotherapy and psychosocial interventions will be discussed.