Bipolar disorder and personality disorder

Abstract
Patients with bipolar disorders experience cyclical changes in mood that present as a range of different syndromes. In classical mania, patients experience episodes of euphoria, whereas in depressive episodes they suffer from depression. In hypomania, patients experience a milder form of mania, and in mixed mania, patients may experience both manic and depressive symptoms simultaneously, or alternate between them rapidly. Because of this wide range of symptoms, bipolar disorders can appear to overlap with other mental disorders, especially personality disorders.