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Benign paroxysmal positional vertigo
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Exam Tips
- In OSCEs, diagnose posterior canal BPPV when Dix-Hallpike triggers brief vertigo plus torsional upbeating nystagmus after a short latency, with no new hearing loss or tinnitus.
- Always state contraindication/caution checks before Dix-Hallpike (significant cervical spine disease, severe back problems, carotid sinus syncope risk, unstable cardiovascular status).
- A normal neuro exam between episodes supports peripheral disease, but any focal neurological signs, persistent spontaneous nystagmus, severe headache, or new unilateral deafness should prompt urgent alternative diagnosis assessment.
- First-line treatment is an immediate canalith repositioning manoeuvre (Epley), not routine long-term vestibular suppressants.
- If Dix-Hallpike is negative but history is classic, repeat later and consider horizontal canal BPPV testing.
- See Figure: Dix-Hallpike head/body positions and expected nystagmus direction in posterior canal BPPV from standard ENT practical-skills texts.
Definition
Benign paroxysmal positional vertigo (BPPV) is an inner-ear disorder causing brief, recurrent episodes of true spinning vertigo triggered by changes in head position relative to gravity. It is diagnosed clinically by characteristic positional nystagmus on manoeuvres such as Dix-Hallpike, most often reflecting posterior semicircular canal involvement.
Pathophysiology
Most BPPV is due to canalithiasis: dislodged otoconia (calcium carbonate crystals) from the utricle enter a semicircular canal and move with head-position change, inappropriately deflecting the cupula via endolymph flow and producing transient vertigo with nystagmus. Less commonly, cupulolithiasis occurs when otoconia adhere to the cupula, increasing gravity sensitivity. The posterior canal is affected in the large majority of cases (about 85-95%), with horizontal canal disease less common and anterior canal disease rare. See Figure: semicircular canal orientation and otoconial migration in standard vestibular anatomy diagrams.
Risk Factors
- Increasing age (commonly presents in the 5th-7th decades)
- Female sex
- Previous head trauma
- Recent inner-ear disease (for example vestibular neuritis, labyrinthitis, Meniere's disease)
- Prolonged recumbency (for example dental/hairdresser positioning)
- Recent viral upper respiratory infection
- Migraine
- Low vitamin D status
- Ear surgery
- Cardiometabolic factors linked with recurrence (hypertension, diabetes, hyperlipidaemia)
- Cervical spondylosis, osteopenia/osteoporosis, prior stroke, otitis media
Clinical Features
Symptoms
- Brief episodic vertigo (typically <1 minute) triggered by lying down, turning in bed, looking up, or bending
- Symptom-free intervals between attacks
- Nausea, sometimes vomiting during episodes
- Persistent mild imbalance or light-headedness between attacks in some patients
- No new hearing loss attributable to BPPV
- No tinnitus attributable to BPPV
Signs
- Usually normal examination at rest between attacks
- Positive Dix-Hallpike for posterior canal BPPV: provoked vertigo with torsional upbeating nystagmus
- Latency of nystagmus/vertigo after positioning (commonly 5-20 seconds)
- Nystagmus builds then fatigues, usually resolving within 1 minute
- Transient reversal nystagmus may occur when sitting up
- Direction clues: left posterior canal often clockwise torsion; right posterior canal often anticlockwise torsion (from examiner perspective)
Investigations
Clinical bedside assessment (ENT, cardiovascular, neurological examination):Typically normal between episodes; used mainly to exclude alternative peripheral or central causes of vertigo
Dix-Hallpike manoeuvre:Reproduction of brief positional vertigo with characteristic torsional upbeating nystagmus supports posterior canal BPPV
Repeat Dix-Hallpike after about 1 week if initial test negative but suspicion remains high:May become positive as attacks fluctuate
Neuroimaging (MRI/CT) only if atypical/red flags:Not required for typical BPPV; arranged to assess alternative diagnoses if focal neurology, atypical nystagmus, or persistent non-positional vertigo
Management
Lifestyle Modifications
- Explain benign but recurrent nature; safety-net for stroke/neurology red flags
- Perform canalith repositioning manoeuvre (usually Epley) as first-line treatment in primary care
- Advise short-term activity caution (falls risk), especially in older adults
- Driving/work-at-height advice during active vertigo episodes
- Consider vestibular rehabilitation/home exercises (for example Brandt-Daroff) if persistent symptoms or recurrence
- Address recurrence contributors where appropriate (for example falls prevention, migraine control, cardiometabolic risk management)
Pharmacological Treatment
Antiemetics/vestibular suppressants (short-term rescue only, not curative)
- Prochlorperazine 5-10 mg orally 3-4 times daily when required (or buccal 3 mg twice daily)
- Cyclizine 50 mg orally up to three times daily when required
Do not use routinely for BPPV itself because repositioning manoeuvres are definitive treatment and sedating drugs may delay vestibular compensation. Use lowest effective dose for the shortest time only if severe nausea/vomiting. Safety: prochlorperazine can cause extrapyramidal reactions, sedation, postural hypotension and is generally avoided in Parkinson's disease; cyclizine has anticholinergic effects (caution in angle-closure glaucoma, urinary retention/prostatic hypertrophy, and frail older adults due to confusion/falls risk).
Surgical / Interventional
- Posterior semicircular canal occlusion surgery in severe, refractory, specialist-managed cases after failure of repeated repositioning and rehabilitation
Complications
- Falls and related injury risk (notably in older adults)
- Reduced ability to perform daily activities
- Reduced quality of life
- Psychological morbidity including depressive symptoms
- Recurrence leading to repeated healthcare use
Prognosis
BPPV is usually benign but often relapsing-remitting. Spontaneous resolution occurs in a substantial minority (around 20% by 1 month and about 50% by 3 months), but recurrence is common (roughly 15% annually, with about half recurring within 3-5 years). Recurrence risk is higher in older adults and in people with prior head trauma and several vascular/metabolic comorbidities.
Sources & References
🏥BMJ Best Practice(1)
✅NICE Guidelines(1)
- Benign paroxysmal positional vertigo[overview]
📖Textbook References(20)
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 1800, 1801)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 631)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 941)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 271)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 273)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 24)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 23, 24)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 941)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 1801)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 988, 989)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 989)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 941, 942)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 273, 274)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 631)[context]
- David Randall PhD MRCP (Editor), John Booth PhD MRCP (Editor), K - Kumar and Clark's Clinical Medicine (2025, American Elsevier Publishing Co.) - libgen.li.pdf(pp. 1800, 1801)[context]
- Netter F. Netter Atlas of Human Anatomy. Classic Regional Approach 8ed 2022.pdf(pp. 230)[context]
- Netter F. Netter Atlas of Human Anatomy. Classic Regional Approach 8ed 2022.pdf(pp. 230)[context]
- Oxford Handbook of Clinical Diagnosis (Huw Llewelyn, Hock Aun Ang, Keir Lewis etc.) (Z-Library).pdf(pp. 495)[context]
- [Oxford Medical Handbooks] Ian Wilkinson, Tim Raine, Kate Wiles, Anna Goodhart, Catriona Ha - Oxford Handbook of Clinical Medicine (2017, Oxford University Press) - libgen.li.pdf(pp. 84, 85)[context]
- [Oxford Medical Handbooks] Ian Wilkinson, Tim Raine, Kate Wiles, Anna Goodhart, Catriona Ha - Oxford Handbook of Clinical Medicine (2017, Oxford University Press) - libgen.li.pdf(pp. 85)[context]