Main diagnosis page

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Criterion A

• At least one hypomanic episode has occurred.

Criterion B

• At least one major depressive episode has occurred.

Criterion C

• There has never been a manic episode.

Criterion D

• The occurrence of hypomanic and major depressive episodes is not better explained by schizophrenia-spectrum or other psychotic disorders.

Criterion E

• Symptoms cause clinically significant distress or impairment, largely through depressive symptoms or unpredictability of mood cycling.

Hypomanic episode definition

• A hypomanic episode is a distinct period of persistently elevated, expansive, or irritable mood together with persistently increased activity or energy.
• The episode lasts at least 4 consecutive days and is present most of the day, nearly every day.
• During the episode, 3 or more manic-type symptoms are present to a significant degree, or 4 if the mood is only irritable.
• The manic-type symptoms are grandiosity, decreased need for sleep, increased talkativeness, flight of ideas or racing thoughts, distractibility, increased goal-directed activity or psychomotor agitation, and excessive involvement in high-risk activities.
• The episode represents an unequivocal change in functioning that is uncharacteristic of the person when not symptomatic.
• The disturbance in mood and functioning is observable by others.
• The episode is not severe enough to cause marked impairment, require hospitalization, or include psychotic features.
• The episode is not attributable to a substance.

Manic episode boundary

• If a full manic episode occurs at any point, the diagnosis is no longer bipolar II disorder and instead falls within bipolar I disorder.

Related Guides

• Bipolar II Disorder Symptoms and Signs
• Bipolar II Disorder Scales and Assessment Tools
• Bipolar II Disorder Treatments and Medications
• When to Seek Professional Help for Bipolar II Disorder