What is the difference between a manic and a hypomanic episode?

A manic episode lasts at least about a week (or requires hospitalisation), causes marked impairment, and may involve psychosis, whereas a hypomanic episode is shorter, milder, and does not cause marked impairment or include psychosis.

Does one manic episode mean a person has bipolar disorder?

A single manic episode is sufficient to establish a diagnosis of bipolar I disorder, even in the absence of any depressive episode.

Manic Episodes

A manic episode is a distinct period of abnormally and persistently elevated, expansive, or irritable mood accompanied by abnormally increased goal-directed activity or energy. It is the defining building block of bipolar I disorder and, in its milder form (hypomania), of bipolar II and cyclothymic presentations.

Definition

A manic episode is a discrete period of at least about one week (or any duration if hospitalisation is needed) of abnormally elevated, expansive, or irritable mood with increased activity or energy, accompanied by characteristic symptoms that cause marked impairment, psychosis, or hospitalisation.

Scope

This entry describes the symptom profile, duration, and severity thresholds of a manic episode, the distinction between mania and hypomania, the role of psychosis and mixed features, and how the episode functions as a diagnostic anchor across the bipolar spectrum. It is reference material describing the clinical concept of the episode, not clinical guidance.

Core questions

What symptoms and duration define a manic episode, and how does it differ from hypomania?
How do psychotic features and mixed features modify a manic episode?
Why is the manic episode the diagnostic anchor of bipolar I disorder?

Key concepts

Elevated, expansive, or irritable mood
Increased goal-directed activity and energy
Decreased need for sleep
Pressured speech and flight of ideas
Distractibility and risky behaviour
Psychotic features
Mixed features
Mania versus hypomania

Mechanisms

A manic episode is recognised by a cluster of symptoms occurring together during the mood disturbance: inflated self-esteem or grandiosity, decreased need for sleep, more talkativeness or pressured speech, flight of ideas or racing thoughts, distractibility, increased goal-directed activity or psychomotor agitation, and excessive involvement in activities with a high potential for harmful consequences. The episode must cause marked functional impairment, necessitate hospitalisation, or include psychotic features; if it does not and is shorter and milder, it is instead a hypomanic episode. Mixed features denote the simultaneous presence of depressive symptoms.

Clinical relevance

The manic episode is central to recognising and classifying bipolar disorder, since a single manic episode establishes bipolar I disorder, and its milder counterpart hypomania underlies bipolar II and cyclothymia. Mania can involve impaired judgement, psychosis, and risk to the person, and its detection is essential to distinguishing bipolar from unipolar mood disorders. This entry describes the clinical concept and is not a basis for individual diagnosis or treatment.

Evidence & guidelines

The phenomenology of mania is described in standard reviews of bipolar disorder (Grande and colleagues 2016; Carvalho and colleagues 2020) and codified in DSM-5 and ICD-11; comparative evidence on the management of acute mania has been synthesised in network meta-analysis (Cipriani and colleagues 2011). Specific treatment selection is beyond the scope of this reference entry.

History

Mania has been described since antiquity and was paired with melancholia in classical and nineteenth-century medicine. Kraepelin's concept of manic-depressive insanity integrated manic episodes into a single recurrent mood illness, and twentieth-century classifications formalised the operational criteria for the manic episode now used in DSM-5 and ICD-11.

Debates

Should the activity/energy criterion be required for a manic episode?: DSM-5 added increased activity or energy alongside mood change as a core, required feature of mania, a change from earlier mood-only definitions that affects how episodes are identified and compared across studies.

Key figures

Emil Kraepelin
Eduard Vieta
John Geddes
Andrea Cipriani

Seminal works

grande-2016
cipriani-2011

Frequently asked questions

What is the difference between a manic and a hypomanic episode?: A manic episode lasts at least about a week (or requires hospitalisation), causes marked impairment, and may involve psychosis, whereas a hypomanic episode is shorter, milder, and does not cause marked impairment or include psychosis.
Does one manic episode mean a person has bipolar disorder?: A single manic episode is sufficient to establish a diagnosis of bipolar I disorder, even in the absence of any depressive episode.