Health condition · Clinically reviewed
Bipolar disorder, type I and type II — recognising, treating and relapse-preventing.
A mood disorder with episodes of depression and (in type I) mania. Long-term mood stabilisers, structured monitoring and psychoeducation transform outcomes.
Why trust this guide
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Clinically reviewed
Written by our editorial team and reviewed by a registered UK clinician before publication.
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Sourced from guidance
Checked against NICE, the Royal College of Psychiatrists and peer-reviewed sources you can see at the end.
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Current for 2026
Reflects current UK guidance on mood stabilisers, structured monitoring and psychoeducation.
Key facts
Bipolar disorder at a glance.
The essentials, in plain English — what it is, the difference between type I and type II, how it is diagnosed and how it is treated in the UK today.
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What it is
A mood disorder with recurrent episodes — manic or hypomanic highs and depressive lows — separated by periods of relative stability.
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Type I vs Type II
Type I involves at least one manic episode. Type II involves hypomania (a milder high) plus depression — never full mania.
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Onset
Symptoms typically start in the late teens to late 20s — often first recognised as depression before mania appears.
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Family history
A first-degree relative with bipolar disorder is one of the strongest risk factors — genetics carry significant weight.
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First-line long-term treatment
Lithium remains the best-evidenced mood stabiliser for relapse prevention and reducing suicide risk.
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Antidepressant caution
In type I, antidepressants can trigger a switch into mania — they are used carefully and usually alongside a mood stabiliser.
Why this guide matters
A recurring condition, and a manageable one.
Bipolar disorder is life-long, but the tools to prevent relapse are strong. The three points below shape everything else on this page.
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Early recognition changes outcomes
The sooner mania or hypomania is identified, the sooner the right long-term treatment can be started.
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Mood stabilisers prevent relapse
Long-term medication — most often lithium — reduces both the frequency and severity of future episodes.
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You are not alone in managing this
Psychoeducation, family-focused therapy and a written relapse plan turn bipolar disorder into a shared, structured task.
How the diagnosis is made
From first conversation to a clear plan.
The steps a UK GP and psychiatry team will normally follow, in order — so you know what to expect and why.
Phase 1 · Recognising
Building the mood history and screening for highs
Phase 2 · Confirming
Ruling out other causes and preparing for treatment
Phase 3 · Managing
Structured monitoring and relapse prevention
- 01
Recognising
Full mood history
A detailed timeline of highs and lows, taken from the patient and — with consent — someone who knows them well.
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Recognising
Screen for mania or hypomania
Validated tools like the MDQ help pick up past highs that were missed at the time.
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Recognising
Physical health screen
Weight, blood pressure, cardiovascular and metabolic baseline — bipolar carries higher long-term physical health risk.
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Confirming
Rule out other causes
Substance use, thyroid disease and steroid medication can all mimic mood swings and must be excluded.
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Confirming
Psychiatry referral
A specialist confirms the diagnosis, subtype (I or II) and starts the long-term treatment plan.
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Confirming
Baseline bloods and ECG
Before starting lithium — U&Es, thyroid, calcium and an ECG establish a safe starting point.
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Managing
Structured mood diary
Tracking mood, sleep and energy over weeks makes early relapse signs visible before a full episode.
Typical timeline: 4–12 weeks from first GP appointment to a settled specialist plan.
Symptoms
What bipolar disorder actually looks like.
Bipolar disorder shows itself through episodes, not a single symptom. Any of the patterns below — especially highs followed by lows — is worth talking to your GP about.
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Manic episode
Elevated or irritable mood, reduced need for sleep, racing thoughts and risky decisions — lasting at least a week.
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Depressive episode
Low mood, loss of interest, low energy and hopelessness — often the reason people first seek help.
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Mixed episode
Symptoms of mania and depression together — high energy with despair or agitation.
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Rapid cycling
Four or more episodes in a year — a pattern that changes the treatment approach.
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Hypomania
A milder high — productive, sociable and needing less sleep, without the loss of function seen in mania.
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Psychotic features
Delusions or hallucinations during a severe episode — needs urgent psychiatric input.
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Post-partum episode
The weeks after childbirth carry a very high risk of a mood episode — planned in advance where possible.
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Suicidal ideation with plan
Any thoughts of ending your life, especially with a plan — same-day help. Samaritans 116 123 or attend A&E.
Treatment
How bipolar disorder is treated in the UK.
A combination of long-term mood stabilisers, targeted acute treatment and structured psychological therapy — matched to episode type and personal circumstances.
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Lithium
The best-evidenced long-term treatment — reduces relapse and suicide risk. Needs regular blood monitoring.
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Sodium valproate
Effective mood stabiliser, but avoided in women of childbearing potential because of serious risk to the baby.
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Quetiapine or olanzapine
Atypical antipsychotics used in acute mania and as long-term mood stabilisers — with metabolic monitoring.
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Lamotrigine
Particularly useful for the depressive pole of bipolar disorder — introduced slowly to avoid rash.
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Antidepressant + mood stabiliser
Sometimes needed for bipolar depression — always paired with a mood stabiliser to reduce switch risk.
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ECT
For severe, treatment-resistant depression or mania, and for life-threatening episodes in pregnancy.
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Psychoeducation and family-focused therapy
Teaches recognition of early warning signs and involves those closest to you in relapse prevention.
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CBT for bipolar disorder
A tailored version of CBT focused on routine, sleep protection and identifying prodromal symptoms.
What this guide is based on
The sources behind every statement on this page.
UK national guidance and specialist society information, current at the time of last review.
Key references
Guidelines and standards we relied on.
A quiet reminder
This guide is for information, not medical advice.
Your GP and psychiatry team know your history and can tell you which parts apply to you. If you are struggling, please reach out — you do not have to wait for a crisis.
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NICE. Bipolar disorder: assessment and management (CG185).
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Royal College of Psychiatrists. Patient information on bipolar disorder.
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British Association for Psychopharmacology. Evidence-based guidelines for treating bipolar disorder (2016).
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Bipolar UK. Patient support and resources.
Red flags
When to reach out today.
Bipolar disorder can shift quickly from stable to urgent. These are the situations where support should not wait — and the numbers to call.
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Suicidal ideation
Any thoughts of ending your life — do not wait. Contact numbers are at the bottom of this list.
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Manic episode with reckless behaviour
Spending, driving or decisions that put safety at risk — urgent psychiatric review.
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Post-partum psychosis
Rapid onset in the days after childbirth — a psychiatric emergency needing admission.
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Neuroleptic malignant syndrome
Fever, rigidity and confusion on antipsychotic medication — call 999.
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Lithium toxicity
Coarse tremor, confusion, vomiting or unsteadiness — stop lithium and seek urgent care.
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Valproate in pregnancy
Teratogenic — must not be used in pregnancy or in women of childbearing potential without strict safeguards.
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Substance-induced mania
Stimulants, cocaine and high-dose steroids can trigger mania — treatment addresses both.
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Rapid cycling
Four or more episodes in a year — changes the medication strategy and needs specialist input.
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New psychotic features
Delusions or hallucinations during a mood episode — same-day psychiatric assessment. Samaritans 116 123 · NHS 111 · 999 or A&E in an emergency.
Living with it
A life-long condition, with relapse to plan for.
Four things that make the biggest difference day to day — sleep, routine, medication continuity and early warning tracking.
A quiet reminder
Feeling well is the point at which to keep going.
The most common trigger for a new episode is stopping medication when things feel stable. Long-term treatment is what keeps that stability.
- 01 Sleep
Protect your sleep
A change in sleep is often the earliest warning sign of a mood episode — treat it as important information.
- 02 Routine
Keep a steady rhythm
Regular hours for meals, activity and sleep support mood stability — especially through stressful periods.
- 03 Medication
Continuity matters
Mood stabilisers work by preventing relapse. Stopping when you feel well is the most common trigger for a new episode.
- 04 Reviews
Track early signs
A mood diary and shared plan with someone close to you catches change before it becomes an episode.
Frequently asked
Everything we get asked about bipolar disorder.
Quick answers on type I versus type II, lithium, antidepressants, early warning signs and where to get help.
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What is the difference between type I and type II bipolar disorder?
Type I involves at least one full manic episode — often severe enough to need hospital admission. Type II involves hypomania (a milder high) plus depressive episodes, but never full mania. Both are serious and both need long-term treatment.
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Is lithium still the best treatment?
For long-term relapse prevention, yes — lithium has the strongest evidence base and is the only mood stabiliser shown to reduce suicide risk. It needs regular blood tests to keep the level in the right range.
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Can I take antidepressants if I have bipolar disorder?
Sometimes — but carefully, and usually alongside a mood stabiliser. Antidepressants on their own can trigger a switch into mania, particularly in type I bipolar.
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What should I do if I notice early warning signs?
Contact your mental health team early. Small changes — sleeping less, thinking faster, spending more — are often the first sign of an episode, and acting early can prevent it becoming full-blown.
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Is bipolar disorder hereditary?
Family history is one of the strongest risk factors. Having a first-degree relative with bipolar disorder increases your risk, though most people with a family history do not develop it.
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When should I go to A&E?
If you are having thoughts of self-harm or suicide, a severe manic episode with reckless behaviour, new psychotic symptoms, or signs of lithium toxicity — call 999 or attend your local A&E.
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