An individual who shows disordered mood shifts in two directions is likely to be classified as having:

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Bipolar disorder (formerly known as manic-depressive illness) is characterized by episodes of manic and depressive mood shifts. Individuals with bipolar disorder experience periods of elevated or irritable moods (mania or hypomania) and periods of depressive episodes. Schizophrenia involves delusions, hallucinations, disordered thinking and behavior, and may include symptoms of mood disturbances, but is not characterized by mood shifts in two directions. Dissociative identity disorder involves the existence of two or more distinct personalities and conversion disorder involves the presence of physical symptoms without any underlying medical cause.

An Individual Who Shows Disordered Mood Shifts in Two Directions