Bipolar Disorder Symptoms and Mania: How to Recognise Them

13 min readUpdated 2 June 2026Medically reviewed

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Key takeaways

Bipolar disorder is characterised by alternating episodes of elevated mood (manic or hypomanic) and depressed mood, with periods of normal functioning often between episodes. ICD-10 codes F31 (bipolar affective disorder) and F30 (manic episode).
Manic episodes require elevated, expansive, or irritable mood with increased energy lasting 1 week or longer, plus 3 of 7 specific symptoms (4 if irritable mood only), with substantial functional impairment, hospitalisation need, or psychotic features. Hypomanic episodes have same symptoms but milder, shorter (4 days minimum), and without marked functional impairment.
Bipolar I requires at least one manic episode; Bipolar II requires at least one hypomanic plus one major depressive episode without ever having full mania. Both are coded F31. Treatment principles overlap but the two types may need different specific approaches.
Distinguishing bipolar from unipolar depression is one of the most important and easily missed clinical distinctions. Approximately 5-10 percent of patients initially diagnosed with unipolar depression turn out to have bipolar disorder. Treatment differs substantially; antidepressant monotherapy in unrecognised bipolar can destabilise the condition.
Recognising warning signs of oncoming mania (decreased sleep need, increased energy, expansive mood, racing thoughts, increased activity) allows preventive intervention. For patients with diagnosed bipolar, individual prodrome recognition is core relapse prevention.

Medically reviewed by Dr. Boppana Sridhar (MBBS, MD Psychiatry, Australia-trained), Consultant Psychiatrist with 9+ years of clinical experience in bipolar disorder including acute mania, hypomania recognition, complex differential diagnosis with unipolar depression, and long-term mood stabiliser management. NMC-registered.

Last updated: 2 June 2026 | Last medically reviewed: 2 June 2026

Bipolar disorder is one of the most misunderstood and most easily misdiagnosed mood disorders. Patients with bipolar typically seek help during depressive episodes; the elevated mood episodes (manic or hypomanic) may not be recognised as symptoms or may not be disclosed. This pattern leads to high rates of misdiagnosis as unipolar depression, with potentially destabilising treatment consequences. This guide provides comprehensive coverage of bipolar disorder symptoms with particular emphasis on mania and hypomania recognition: the types of bipolar disorder, full DSM-5 criteria for manic and hypomanic episodes, depressive episodes in bipolar context, mixed features, psychotic features, warning signs that precede episodes, the critical distinction from unipolar depression, severity grades, and India-specific context.

What bipolar disorder is

Bipolar disorder is a mood disorder characterised by alternating episodes of elevated mood (manic or hypomanic) and depressed mood, with periods of normal functioning (euthymia) often between episodes. The condition involves measurable changes in brain function, neurochemistry, and stress response systems. It is a medical condition requiring specific treatment, not a character trait or temperament variation.

Bipolar disorder affects approximately 1-2 percent of adults globally with similar prevalence in India per available studies, though precise Indian prevalence estimates vary across studies. The condition typically begins in late adolescence to mid-20s, though onset can occur at any age. Both men and women are affected at approximately equal rates overall, though Bipolar II appears more common in women.

ICD-10 codes bipolar disorder primarily as F31 (Bipolar affective disorder) with various subcategories. F30 codes Manic episode (single episode without recurrence). DSM-5 uses Bipolar I Disorder, Bipolar II Disorder, Cyclothymic Disorder, and Other Specified or Unspecified Bipolar Disorders as distinct categories.

The condition is highly treatable with mood stabilising medication, psychotherapy, lifestyle measures, and family education. With appropriate treatment, most patients achieve substantial improvement in mood stability and functioning. Untreated bipolar carries substantial risks including hospitalisations, financial and relationship damage during manic episodes, severe depression with high suicide risk, and functional impairment.

Types of bipolar disorder

Bipolar I Disorder

At least one full manic episode in the illness course. Depressive episodes are typical but not required for diagnosis. Manic episodes are typically severe, sometimes with psychotic features, often requiring hospitalisation. Most severe and most clearly recognised type.

Bipolar II Disorder

At least one hypomanic episode and at least one major depressive episode, without ever having a full manic episode. Hypomania is milder; depressive episodes often dominate. Frequently misdiagnosed as unipolar depression. More common in women.

Cyclothymic Disorder

Chronic alternating periods of mild depressive and hypomanic symptoms lasting at least 2 years, without ever meeting full criteria for either depressive episode or hypomanic episode. ICD-10 F34.0.

Substance/medication-induced bipolar

Manic or hypomanic symptoms during or after substance use or medication exposure (stimulants, corticosteroids, antidepressants in vulnerable patients). Symptoms typically resolve with substance discontinuation.

Bipolar due to another medical condition

Manic or hypomanic symptoms caused by medical condition (multiple sclerosis, brain injury, certain endocrine disorders). Treating the underlying condition is primary; mood symptoms may persist requiring additional treatment.

Other Specified/Unspecified Bipolar

Presentations with bipolar features that do not meet full criteria for the above categories. Includes short-duration hypomanic episodes, hypomania without depression history, and others. Often considered subthreshold or atypical bipolar.

Manic episode symptoms

A manic episode is the defining feature of Bipolar I Disorder. Per DSM-5, a manic episode requires:

Distinct period of abnormally and persistently elevated, expansive, or irritable mood AND abnormally and persistently increased goal-directed activity or energy
Duration: at least 1 week, present most of the day, nearly every day (or any duration if hospitalisation is required)
Symptoms: 3 or more of 7 specific symptoms (4 if mood is only irritable)
Functional impact: marked impairment in social or occupational functioning, OR necessitates hospitalisation to prevent harm, OR psychotic features present
Exclusion: not attributable to substance or medical condition (though substance-induced episodes that persist beyond expected duration can still meet criteria for bipolar)

The mood disturbance is so severe that it disrupts work, relationships, and self-care. Patients often deny anything is wrong; family members, colleagues, or employers may bring the patient to medical attention. Severe manic episodes can result in financial damage (excessive spending, risky business decisions), relationship damage (impulsive sexual behaviour, conflicts), legal consequences, and physical exhaustion from lack of sleep.

The 7 DSM-5 manic symptoms

DSM-5 specifies 7 symptoms; 3 or more must be present during the episode (4 if mood is only irritable rather than elevated or expansive):

1. Inflated self-esteem or grandiosity

Self-confidence beyond reasonable assessment of abilities; in severe cases, delusional grandiosity (believing oneself to be famous, have special powers, special mission, special relationship with religious or political figures).

2. Decreased need for sleep

Feeling rested after only 3-4 hours of sleep, or going days with little or no sleep without obvious fatigue. This is among the most consistent and recognisable manic symptoms.

3. More talkative than usual or pressure to keep talking

Pressured speech that is difficult to interrupt, loud, rapid, and continuous. Sometimes the patient must speak even when no audience available.

4. Flight of ideas or subjective experience of racing thoughts

Thoughts moving rapidly from one topic to another, sometimes with loose associations. Subjectively experienced as the brain working faster, ideas coming faster than they can be expressed.

5. Distractibility

Attention easily drawn to unimportant external stimuli. Difficulty maintaining focus on any task; jumping between activities; reduced ability to follow conversations or complete tasks.

6. Increased goal-directed activity or psychomotor agitation

Increased activity at work, socially, sexually, or in personal projects. Multiple new projects, plans, social initiatives. Can manifest as physical restlessness with inability to sit still, or as productive-seeming intense activity.

7. Excessive involvement in pleasurable activities with high potential for painful consequences

Unrestrained spending, risky sexual activity, foolish business investments, gambling, substance use, impulsive travel, reckless driving. Behaviour the patient would not typically engage in.

The combination of these symptoms with elevated, expansive, or irritable mood and increased energy for at least 1 week, with substantial functional impact, defines a manic episode. The presence of just one of these symptoms without the others, or without the duration criterion, does not constitute mania; the syndrome is what matters.

Hypomania

Hypomania is a milder form of mania with the same symptoms but less severe and shorter duration. Per DSM-5:

Duration: at least 4 days (vs 1 week for mania)
Symptoms: 3 or more of the same 7 symptoms (4 if irritable mood only)
Severity: does NOT cause marked impairment in social or occupational functioning
Hospitalisation: does NOT require hospitalisation
Psychotic features: absent (if present, the episode is mania)
Observability: the change in functioning is observable by others, representing change from typical baseline

Why hypomania matters clinically: Hypomania can feel productive, energetic, creative, and pleasant. Patients often do not recognise it as symptom because they feel good. Some describe it as their "best self". This experience leads to several clinical challenges:

Patients are reluctant to disclose hypomanic episodes during depression-focused consultations
Patients may resist treatment that suppresses hypomanic episodes
Family members and partners often notice hypomania before the patient does
Hypomania often precedes depressive episodes that are not pleasant
Hypomania can progress to full mania in some patients
The pattern of hypomania alternating with depression is the defining feature of Bipolar II Disorder

Recognition of hypomania is essential because it indicates bipolar disorder requiring specific treatment. Patients seeking help for depression should be asked specifically about prior periods of unusually high energy, decreased sleep need, expansive mood, racing thoughts, increased activity. Family members and partners can provide important corroborative information.

Depressive episodes in bipolar

Depressive episodes in bipolar disorder meet the same DSM-5 criteria as Major Depressive Disorder: 5 or more of 9 symptoms present nearly every day for 2 weeks or longer, with depressed mood or anhedonia required, and substantial functional impairment. See our MDD guide for detailed criteria.

However, several features may distinguish bipolar depression from unipolar depression:

Atypical features more common: hypersomnia (oversleeping), increased appetite and weight gain, leaden paralysis (heavy feeling in arms or legs), mood reactivity
Psychomotor retardation more pronounced: physical slowing more visible than in typical unipolar depression
Mixed features: some elevated mood symptoms during depressive episode (irritability, racing thoughts, increased activity despite low mood)
Earlier onset: bipolar depression often appears in late teens to mid-20s
Family history: family history of bipolar disorder raises probability
Treatment resistance: incomplete response to standard antidepressant treatment
Antidepressant-induced switches: brief manic or hypomanic episodes after starting antidepressants
Postpartum onset: bipolar depression can present after childbirth
Psychotic features: mood-congruent or mood-incongruent psychotic features more common in bipolar depression
Rapid cycling potential: 4 or more episodes in 12 months suggests bipolar pattern

Depressive episodes typically occupy more time than manic episodes across the course of bipolar disorder; some patients spend 30-50 percent of illness time in depressive episodes vs only 5-10 percent in manic episodes. This is part of why patients often present seeking help for depression and why bipolar disorder is frequently missed.

Mixed features

Mixed features specifier in DSM-5 describes presentations where some symptoms of opposite polarity occur simultaneously. Two patterns:

Manic episode with mixed features: patient meets criteria for manic episode but also has 3 or more depressive symptoms (sad mood, anhedonia, psychomotor retardation, worthlessness or guilt, fatigue, suicidal thoughts) simultaneously.

Depressive episode with mixed features: patient meets criteria for major depressive episode but also has 3 or more elevated mood symptoms (elevated mood, grandiosity, pressured speech, racing thoughts, increased energy, distractibility, decreased sleep need) simultaneously.

Mixed features matter clinically because:

Increased suicide risk during mixed episodes
Standard treatment approaches may need adjustment
Antidepressants may worsen mixed depressive episodes
Often more severe and treatment-resistant than pure manic or depressive episodes
Often missed in clinical assessment because the dual nature is confusing

Psychotic features in mania

Severe manic episodes can include psychotic features: delusions or hallucinations. Two patterns:

Mood-congruent psychotic features: content matches manic themes. Examples: grandiose delusions (believing oneself to be a famous person, have special powers, special religious mission), delusions of inflated worth, identity, or relationship to deity or famous person. Auditory hallucinations may include voices praising the patient.

Mood-incongruent psychotic features: content does not match mood themes. Examples: paranoid delusions, delusions of persecution, hallucinations not related to manic themes. These are less common in pure mania than mood-congruent features.

Psychotic features during mania can be intense and concerning to family. They typically resolve with treatment of the manic episode; mood stabilisers plus antipsychotics are usually required. The presence of psychotic features distinguishes manic episode from hypomanic episode (hypomania by definition does not include psychosis).

Differential diagnosis includes schizoaffective disorder (psychotic symptoms present outside mood episodes) and schizophrenia. Specialist assessment is appropriate when psychotic features complicate the clinical picture.

Severity and course patterns

Bipolar disorder severity and course vary substantially:

Severity / Pattern	Features	Treatment implications
Mild hypomania	Hypomanic symptoms present but barely meeting criteria; minimal disruption	Mood stabiliser, lifestyle measures, monitoring; outpatient care
Severe hypomania (toward mania)	Hypomanic symptoms intense, approaching mania; functional impact increasing	Treatment intensification; close monitoring; risk of progression
Mild to moderate mania	Full manic episode criteria met; substantial functional impairment	Mood stabiliser plus often atypical antipsychotic; outpatient if safety maintained
Severe mania	Severe symptoms, possible psychotic features, safety concerns	Hospitalisation usually required; combination treatment; ECT considered
Rapid cycling	4 or more episodes (depressive, manic, hypomanic, or mixed) in 12 months	Treatment-resistant pattern; specific approaches; often longer treatment course
Ultra-rapid cycling	Cycles within weeks or days	Severe presentation; specialist management; aggressive mood stabilisation
Chronic / persistent	Continued symptoms with limited remission periods	Long-term maintenance treatment; combined approaches; addressing comorbidities

Warning signs of oncoming episode

Early warning signs of manic or hypomanic episodes often appear days to weeks before full episode. Recognising these allows preventive intervention.

Common warning signs of mania:

Decreased need for sleep (sleeping less, feeling rested after fewer hours)
Increased energy and activity beyond usual baseline
Increased talkativeness or rapid speech
Brighter or more expansive mood than typical
Increased confidence or expansive feelings
Increased irritability in some patients
Racing thoughts beginning
Increased goal-directed activity (new projects, plans)
Increased libido
Increased spending or impulsive decisions
Reduced need for usual routines
Family or friends commenting on changed behaviour
Increased religious or spiritual preoccupation in some patients
Increased substance use

Common warning signs of bipolar depression: persistent low mood, anhedonia, hypersomnia, increased appetite, fatigue, social withdrawal, suicidal thoughts in severe cases. These match unipolar depression warning signs but in a patient with diagnosed bipolar disorder, monitoring for these is particularly important.

For patients with diagnosed bipolar disorder, identifying personal prodrome (early warning sign pattern unique to the individual) is core relapse prevention work. Family members and partners are often the first to notice; their involvement in monitoring matters substantially. When warning signs appear, prompt contact with the psychiatrist allows medication adjustment, sleep optimisation, stress reduction, and other interventions.

Bipolar vs unipolar depression

5-10%

Approximately 5-10 percent of patients initially diagnosed with unipolar depression turn out to have bipolar disorder when a manic or hypomanic episode eventually emerges. This is one of the most common and most consequential psychiatric misdiagnoses.

Distinguishing bipolar from unipolar depression is critical because treatment differs substantially. Antidepressant monotherapy in unrecognised bipolar can destabilise the condition by triggering manic episodes, accelerating cycling, or producing mixed states.

Feature	Bipolar depression	Unipolar depression
Prior manic/hypomanic episodes	Yes (required for diagnosis)	No
Age of onset	Often earlier (late teens to mid-20s)	More variable; peak in 20s but any age
Family history	Bipolar disorder in family more common	Unipolar depression in family
Sleep pattern	Hypersomnia more common	Insomnia or hypersomnia
Appetite	Increased appetite and weight gain more common	Either decreased or increased
Psychomotor	Retardation more pronounced	Variable
Mixed features	More common	Less common
Response to antidepressants	Often partial, may trigger mania	Usually responsive
Rapid cycling	Possible (4+ episodes per year)	Not characteristic
Postpartum onset	Possible; postpartum mania can occur	Postpartum depression common
Psychotic features	More common	Less common
Treatment	Mood stabilisers foundation; antidepressants cautiously	Antidepressants first-line

Diagnostic clarity requires thorough history including specific questions about prior periods of elevated or expansive mood, decreased sleep need, increased energy, racing thoughts, increased activity, expansive plans, increased confidence. Family members often have information patients do not recall or disclose. Family history of bipolar disorder, postpartum psychiatric episodes, or psychiatric hospitalisations warrant detailed inquiry.

Bipolar I vs Bipolar II

Feature	Bipolar I	Bipolar II
Required episode	At least one manic episode	At least one hypomanic plus one major depressive episode
Mania ever	Yes (required)	No (would change diagnosis to Bipolar I)
Depressive episodes	Typical but not required for diagnosis	Required for diagnosis
Severity of elevated mood	Severe; functional impact marked; possible psychosis; possible hospitalisation	Milder; observable change but functional impairment not marked
Hospitalisation history	Often required during manic episodes	Usually not required for hypomanic episodes
Gender	Approximately equal in men and women	More common in women
Predominant pole	Often depression with intermittent mania	Often depression with brief hypomania
Diagnostic recognition	Manic episodes typically recognised	Hypomanic episodes often missed; frequent misdiagnosis as unipolar depression
Treatment	Mood stabilisers + antipsychotics often; antidepressants cautiously	Mood stabilisers; antidepressants more cautiously than unipolar but role in some cases
Suicide risk	Substantial	Substantial; some studies suggest equal or higher than Bipolar I

Bipolar II is sometimes considered less severe than Bipolar I because the elevated mood episodes are milder. However, research shows comparable functional impact when comorbidities, depressive burden, and suicide risk are considered. Both conditions warrant active treatment.

India context

Bipolar disorder in India has specific access and recognition considerations:

Prevalence and underrecognition. Global lifetime prevalence of bipolar disorder is approximately 1-2 percent; Indian studies suggest similar rates with variation. Underrecognition substantial; many patients present in depressive episodes without bipolar diagnosis being made. The National Mental Health Survey of India (NMHS, 2015-16) reports overall bipolar prevalence around 0.3 percent though this likely underestimates given recognition challenges.

Cultural factors affecting recognition. Hypomanic episodes may be culturally normalised as productivity, enthusiasm, religious fervour, or family success. Manic episodes may be attributed to spiritual causes, evil eye, or supernatural influences before psychiatric assessment. Family-honour considerations may delay help-seeking until severe episodes force action. Stigma around mental illness is substantial; bipolar diagnosis carries particular implications for marriage prospects, employment, and family relationships.

Religious framings. Some patients experience religious or spiritual content during manic episodes (visions, special religious mission, identity as religious figure). Distinguishing genuine spiritual experience from psychotic features requires cultural sensitivity; not all religious experience is pathological. Cultural and family context matters for interpretation.

Access landscape. NIMHANS Bengaluru, AIIMS Delhi, state mental health institutes, and District Mental Health Programme services provide bipolar disorder treatment. Lithium, valproate, and other mood stabilisers are widely available. Lithium levels can be monitored at most major centres. Private psychiatric care provides full bipolar management in urban centres. Tele-MANAS (14416) provides 24x7 mental health support and can guide to appropriate services.

Treatment access barriers. Mood stabiliser treatment is typically long-term, sometimes lifelong. Sustained access matters for the chronic nature of bipolar. Government services provide free or low-cost medication; private treatment costs accumulate. Lithium monitoring requires periodic blood tests adding to ongoing cost.

Family involvement. Indian joint family structures can both support and complicate bipolar management. Family education is particularly important; family members often need to recognise warning signs, support medication adherence, and accept the chronic nature of the condition. Tele-MANAS, NIMHANS, and many psychiatrists provide family education.

Marriage and reproductive considerations. Cultural pressure around marriage and childbearing affects bipolar patients particularly. Decisions about disclosure to potential partners, family, and in-laws are complex. Pregnancy planning requires medication review (some mood stabilisers contraindicated in pregnancy). Postpartum period carries particular risk for bipolar episode. Specialist guidance valuable for these decisions.

When to seek help

Professional consultation is appropriate when:

Episodes of unusually elevated, expansive, or irritable mood lasting days or longer with increased energy
Decreased need for sleep without obvious fatigue
Family or friends have noticed substantial mood or behaviour changes
Periods of substantial increase in activity, talkativeness, or spending
Depressive episodes alternating with periods of elevated mood
Treatment-resistant depression not responding to standard antidepressants
Postpartum onset of severe mood symptoms with elevated mood features
Family history of bipolar disorder with personal mood symptoms
Suicidal thoughts or self-harm (immediate help)
Mood symptoms with psychotic features (delusions, hallucinations)
Substance use accompanying mood instability
Severe functional impairment from mood symptoms

For active mania, contact a psychiatrist promptly. Severe manic episodes may require hospitalisation. In India, Tele-MANAS (14416) provides 24x7 guidance; NIMHANS, AIIMS, and state psychiatric hospitals provide emergency care.

Red flags warranting urgent attention

Active mania with risk-taking, financial impulsivity, or sexual risk
Manic episode with psychotic features (delusions, hallucinations)
Suicidal thoughts or self-harm in any mood episode
Severe insomnia (3 or fewer hours per night) for multiple consecutive days
Marked impairment in self-care or safety judgment
Substance use accompanying mood instability
Sudden onset of severe symptoms suggesting acute episode
Postpartum onset of manic symptoms
Aggressive or dangerous behaviour
Inability to care for dependents during episode
Manic episode lasting more than a few days without medical contact
Mixed features with depression and elevated mood symptoms simultaneously

A note from Dr. Boppana Sridhar

Bipolar disorder is one of the most consequential diagnoses to get right in psychiatry. The same depressive episode in a unipolar patient versus a bipolar patient requires different treatment; the wrong treatment can substantially worsen the condition. When I see new patients presenting with depression, I always ask carefully about prior periods of elevated mood, decreased sleep need, increased energy, expansive plans, or family members thinking the patient was unusually energetic or different. Patients sometimes do not recognise these episodes as relevant; they remember them as productive periods or as their best self. Family history of bipolar disorder, postpartum psychiatric hospitalisations, or psychiatric admissions of family members warrants particular attention. For patients with hypomanic episodes, I want them to understand that even though hypomania can feel good, it indicates bipolar disorder requiring specific treatment; the alternating depressive episodes are not pleasant, and untreated hypomania can progress to mania. For Indian patients particularly, I encourage openness about elevated mood episodes that may have been attributed to religious experience, business success, or family happiness; the clinical assessment can determine whether these were normal expressions or hypomanic episodes. Accurate diagnosis is foundation for effective treatment, and bipolar disorder is highly treatable with appropriate care.

Frequently asked questions

What are the symptoms of bipolar disorder?

Bipolar disorder is characterised by alternating episodes of elevated mood (manic or hypomanic) and depressed mood, with periods of normal functioning often between episodes. Manic episode symptoms per DSM-5 require either elevated, expansive, or irritable mood with increased energy lasting at least 1 week (or any duration if hospitalisation required), plus 3 or more of 7 specific symptoms (4 if mood is only irritable): inflated self-esteem or grandiosity; decreased need for sleep; more talkative than usual or pressure to keep talking; flight of ideas or racing thoughts; distractibility; increased goal-directed activity or psychomotor agitation; excessive involvement in pleasurable activities with high potential for painful consequences (spending, sex, risky decisions). Depressive episodes in bipolar match Major Depressive Disorder criteria (5 of 9 symptoms, 2 weeks, functional impairment). Hypomanic episodes have same symptoms as mania but milder, lasting at least 4 days, without psychotic features or hospitalisation, and without marked functional impairment. ICD-10 coded as F31 (bipolar affective disorder), F30 (manic episode). Treatment differs substantially from unipolar depression; mood stabilisers are foundation.

What is a manic episode?

A manic episode is a distinct period of abnormally and persistently elevated, expansive, or irritable mood with increased goal-directed activity or energy, lasting at least 1 week (or any duration if hospitalisation required), present most of the day, nearly every day. Per DSM-5, the episode requires 3 or more of 7 specific symptoms (4 if mood is only irritable): inflated self-esteem or grandiosity (sometimes delusional); decreased need for sleep (feels rested after only 3-4 hours); more talkative than usual or pressured speech; flight of ideas or subjective experience of racing thoughts; distractibility; increased goal-directed activity (socially, at work, sexually) or psychomotor agitation; excessive involvement in pleasurable activities with high potential for painful consequences (unrestrained spending, risky sexual activity, foolish business investments). Mood disturbance must be sufficiently severe to cause marked impairment in social or occupational functioning, necessitate hospitalisation to prevent harm, or be accompanied by psychotic features. ICD-10 coded F30. Manic episodes are medical emergencies requiring prompt psychiatric assessment and typically inpatient treatment in severe cases.

What is hypomania?

Hypomania is a milder form of mania with similar symptoms but less severe and shorter duration. Per DSM-5, a hypomanic episode requires elevated, expansive, or irritable mood with increased energy lasting at least 4 days (vs 1 week for mania), present most of the day, nearly every day, with 3 or more of 7 symptoms (4 if irritable mood only) matching manic criteria. Critical differences from mania: hypomania does not cause marked impairment in social or occupational functioning; does not require hospitalisation; does not involve psychotic features. The mood and behaviour change is observable by others but not so severe as to substantially disrupt life. Hypomania is the defining feature of Bipolar II Disorder. Hypomania can feel productive and pleasant subjectively; patients may be reluctant to recognise it as symptom because they feel good, energetic, creative. Family members often notice it before the person does. Despite feeling pleasant, hypomania matters clinically because it indicates bipolar disorder requiring specific treatment; it also typically alternates with depressive episodes that are not pleasant; and it can progress to full mania in some patients. ICD-10 codes hypomania within F30 and F31.

What is the difference between bipolar I and bipolar II?

Bipolar I and Bipolar II differ primarily in the severity of elevated mood episodes. Bipolar I Disorder requires at least one full manic episode (DSM-5 criteria for mania) at some point. Depressive episodes are common but not required for diagnosis; one manic episode is sufficient. Manic episodes are typically severe, sometimes with psychotic features, often requiring hospitalisation. Bipolar I tends to have more severe presentation overall. Bipolar II Disorder requires at least one hypomanic episode and at least one major depressive episode. The person has never experienced a full manic episode. Hypomanic episodes are by definition milder, shorter, and do not cause marked functional impairment. Depressive episodes in Bipolar II are often more frequent and severe than the hypomanic episodes; patients often present seeking help for depression without disclosing or recognising the hypomanic episodes. Both conditions are coded F31 in ICD-10 (Bipolar affective disorder). Diagnostic clarity matters because treatment principles overlap but specific medications and approaches may differ. Both require mood stabilisers; antidepressant monotherapy can destabilise both conditions. Bipolar II is sometimes considered less severe but research shows comparable functional impact when comorbidities and depressive burden are considered.

How long do manic episodes last?

Manic episode duration varies substantially across individuals and circumstances. Per DSM-5, a manic episode requires at least 1 week duration (or any duration if hospitalisation is required), present most of the day, nearly every day. Hypomanic episodes require at least 4 days. Without treatment, the typical untreated manic episode lasts 2-4 months on average, though individual variation is wide; some episodes resolve in weeks, others persist for many months. Depressive episodes in bipolar typically last longer than mania, often 6-12 months untreated. The episode pattern (frequency of mania, frequency of depression, length of well periods between) varies enormously across patients. Some patients have rare episodes separated by years of normal functioning; others cycle frequently with multiple episodes per year (rapid cycling, defined as 4 or more episodes in 12 months). With appropriate mood stabiliser treatment, manic episodes can be substantially shortened. Untreated bipolar carries substantial risks; effective treatment substantially reduces episode duration, frequency, and severity. Early recognition and treatment of manic episodes can prevent progression to severe stages requiring hospitalisation.

Can you have bipolar without obvious mania?

Yes, particularly in Bipolar II Disorder where elevated mood episodes are hypomanic (milder) rather than full mania, and in some atypical presentations. Hypomania can be subtle and pleasant, often experienced as productive, creative, or energetic rather than recognised as symptom. Patients with Bipolar II frequently present seeking help for depression (which is more distressing) without recognising or disclosing prior hypomanic episodes. Diagnostic clarity requires specific questions about prior periods of unusually high energy, decreased sleep need, increased activity, pressured speech, racing thoughts, expansive mood, increased confidence or risk-taking. Family members and partners may notice hypomanic episodes the patient does not recognise. Particular populations where bipolar may present without obvious mania include: patients who first present in depressive episode of Bipolar II; patients with rapid cycling where episodes are brief and frequent; patients in long depressive episodes between rare manic episodes; some elderly patients with attenuated symptom expression; patients on antidepressants that may suppress mania while allowing depressive symptoms; women particularly (Bipolar II more common in women than men). Recognition of subtle bipolar matters because treatment differs substantially from unipolar depression; antidepressant monotherapy can destabilise the condition.

What are warning signs that mania is starting?

Early warning signs of an oncoming manic or hypomanic episode often appear days to weeks before full episode develops. Recognising these allows preventive intervention which can substantially reduce episode severity. Common early signs include: decreased need for sleep (feeling rested after fewer hours, staying up later, waking earlier without fatigue); increased energy and activity; subtle increase in talkativeness, sometimes more rapid speech; brighter mood than usual; increased confidence or expansive feelings; increased irritability in some patients; racing thoughts beginning; increased goal-directed activity (new projects, plans, social initiatives); increased libido; increased spending or impulsive decisions; reduced need for usual routines; family or friends commenting on changed behaviour. For patients with diagnosed bipolar disorder, identifying personal warning signs is a core part of relapse prevention. Patients often learn their individual prodrome pattern. Family members are often the first to notice; their involvement in monitoring matters. When warning signs appear, prompt contact with the psychiatrist allows medication adjustment, sleep optimisation, stress reduction, and other interventions that can prevent full episode progression. Untreated warning signs can progress to full mania within days to weeks.

How is bipolar disorder different from unipolar depression?

Bipolar disorder and unipolar (Major) depression both involve depressive episodes but differ critically in additional features that affect diagnosis and treatment. Bipolar disorder requires at least one episode of elevated mood (manic in Bipolar I, hypomanic in Bipolar II) at some point in the illness course; unipolar depression has no manic or hypomanic episodes. Diagnostic clarity matters because treatment differs substantially. Bipolar disorder requires mood stabilisers (lithium, valproate, lamotrigine, atypical antipsychotics) as foundation of treatment; antidepressant monotherapy can destabilise the condition by triggering manic episodes or accelerating cycling. Unipolar depression is treated primarily with antidepressants (SSRIs, SNRIs, others) and psychotherapy. Distinguishing the conditions requires thorough history including specific questions about prior periods of elevated mood, decreased sleep need, increased energy and activity, expansive mood, increased confidence. Family history of bipolar disorder raises suspicion. Onset patterns: bipolar often has earlier onset (late adolescence to mid-20s); unipolar more variable onset. Depression characteristics in bipolar may differ subtly from unipolar (more hypersomnia, atypical features, mixed features, treatment-resistance, family history of mood disorders). Approximately 5-10 percent of patients initially diagnosed with unipolar depression turn out to have bipolar disorder when manic episode eventually emerges; this is one of the most common psychiatric misdiagnoses.

Medical disclaimer: This article provides general health education and does not replace personalised consultation with a qualified mental health professional. Bipolar disorder requires individual clinical assessment for accurate diagnosis and appropriate treatment planning. Active mania is a medical emergency. If you are experiencing severe symptoms or thoughts of self-harm, contact a crisis helpline or emergency services immediately.

About the author

247healthcare.blog editorial team writes general health and preventive medicine content reviewed by qualified doctors. Every article is fact-checked against current guidance from DSM-5, ICD-10/11, NICE CG185 (bipolar), APA, WHO, NMHS NIMHANS, Cochrane reviews, and peer-reviewed mood disorders literature before publication.

About the medical reviewer

Dr. Boppana Sridhar (MBBS, MD Psychiatry, Australia-trained) is the Consultant Psychiatrist and department lead for Psychiatry and Psychology at Vivekananda Hospital, Begumpet, Hyderabad. He has 9+ years of clinical experience in bipolar disorder including acute mania, hypomania recognition, complex differential diagnosis with unipolar depression, and long-term mood stabiliser management. NMC-registered.