Dizziness and Vertigo | Causes, Diagnosis, and Treatment
From BPPV to Meniere's disease, understand the causes of dizziness and vertigo, how to distinguish them, and the most effective treatments available today.
Q: I keep getting dizzy spells. Is that vertigo?
Not necessarily — and the distinction matters more than most people realize. Dizziness is one of the most common complaints in general medicine, accounting for roughly 4% of all emergency department visits, yet it encompasses a wide spectrum of sensations with very different causes, prognoses, and treatments. Misidentifying the type can lead to wasted time on the wrong workup or — more consequentially — missing a serious central nervous system event.
This FAQ-style guide walks through the major categories of dizziness, how clinicians differentiate them, and what the evidence says about treatment.
Q: What is the difference between dizziness and vertigo?
Dizziness is a broad umbrella term. Clinically, it is useful to separate it into four categories based on the patient’s description:
- Vertigo: A false sense of motion — feeling that you or your environment is spinning, tilting, or moving when it is not. This is vestibular in origin (inner ear or vestibular brainstem pathways).
- Presyncope: A feeling of faintness, lightheadedness, or impending loss of consciousness, typically cardiovascular or autonomic in origin.
- Disequilibrium: A sense of imbalance or unsteadiness, often neurological or musculoskeletal in origin.
- Non-specific dizziness: Floating, foggy, or vague sensations that don’t fit the above — often anxiety-related, metabolic, or medication-induced.
Vertigo is the most clinically actionable category because it points directly toward vestibular pathology.
Q: What is BPPV and why is it so common?
Benign paroxysmal positional vertigo (BPPV) is the most common cause of vertigo, accounting for approximately 17–20% of all vertigo presentations. It occurs when otoconia — tiny calcium carbonate crystals normally embedded in the utricle of the inner ear — become dislodged and migrate into one of the semicircular canals.
When the head moves, these loose crystals move through the canal fluid and continue stimulating the cupula after the head has stopped, creating an aberrant signal of motion. The result is brief but intense rotational vertigo triggered by specific head positions — typically lying down, rolling over in bed, or tilting the head back.
BPPV is diagnosed using the Dix-Hallpike maneuver (for posterior canal involvement, the most common type) or the supine roll test (for horizontal canal BPPV). A characteristic geotropic or apogeotropic nystagmus pattern confirms the diagnosis.
Treatment: The Epley canalith repositioning maneuver is remarkably effective for posterior BPPV, achieving resolution in approximately 80–90% of cases in a single clinical session. The procedure uses gravity and a precise sequence of head positions to guide the dislodged crystals back into the utricle. Patients can also be taught a self-administered version for home management of recurrences. BPPV frequently recurs — the annual recurrence rate is approximately 15–50% — but treatment remains effective on each episode.
Q: What is vestibular neuritis?
Vestibular neuritis is an acute, usually unilateral inflammation of the vestibular nerve, most commonly following a viral upper respiratory infection. Patients experience sudden-onset severe vertigo that persists continuously (unlike BPPV’s episodic nature), typically lasting days and gradually improving over weeks.
Associated features include nausea and vomiting (often prominent), postural instability, and a characteristic unidirectional horizontal nystagmus. Hearing is preserved (distinguishing it from labyrinthitis, where the cochlear nerve is also involved).
The acute phase is managed with vestibular suppressants (see pharmacological treatments below) for the first 24–72 hours. Beyond that, early mobilization and vestibular rehabilitation are preferred over ongoing suppression, as the brain needs to recalibrate its sense of balance through a process called central compensation.
Q: How does Meniere’s disease differ?
Meniere’s disease is a disorder of endolymphatic fluid regulation in the inner ear. It presents as episodic attacks lasting 20 minutes to 12 hours, combining:
- Rotational vertigo
- Fluctuating sensorineural hearing loss
- Tinnitus (ringing or roaring in the affected ear)
- Aural fullness (a sensation of pressure or fullness in the ear)
The pathology involves endolymphatic hydrops — excess fluid in the membranous labyrinth — though the underlying cause is incompletely understood. Attacks can be disabling and unpredictable; over time, progressive hearing loss often develops.
Treatment aims to reduce attack frequency and severity: dietary sodium restriction, diuretics (acetazolamide, hydrochlorothiazide), and intratympanic steroid injections. For refractory cases, intratympanic gentamicin ablation of vestibular function in the affected ear can reduce attacks but at the cost of residual vestibular loss.
Q: How do doctors distinguish inner ear (“peripheral”) from brain (“central”) causes?
This distinction is the most urgent diagnostic task with a vertiginous patient, because central causes — brainstem stroke, cerebellar hemorrhage, multiple sclerosis plaques — require immediate evaluation and very different management.
The HINTS exam (Head Impulse, Nystagmus type, Test of Skew) is a bedside examination battery that, when properly performed, has sensitivity exceeding MRI in the first 24–48 hours for ruling out posterior fossa stroke in patients with acute continuous vertigo:
- Head Impulse Test: An abnormal (positive) test — corrective catch-up saccades on rapid head rotation — suggests peripheral pathology. A normal (negative) test in acute continuous vertigo is a red flag for central cause.
- Nystagmus: Peripheral nystagmus is unidirectional, horizontal-torsional, and suppressed by visual fixation. Direction-changing nystagmus (changes depending on gaze direction) is a central sign.
- Test of Skew: Vertical eye misalignment (skew deviation) on cover-uncover testing indicates brainstem pathology.
Other red-flag features that increase suspicion for central cause include sudden severe headache, diplopia, dysarthria, facial numbness, limb ataxia, or neurological deficits outside the vestibular system.
Q: What about dizziness linked to anxiety?
The relationship between dizziness and anxiety is bidirectional and clinically significant. Anxiety — particularly panic disorder and health anxiety — can produce genuine vestibular-like symptoms through hyperventilation, changes in cerebral blood flow, and heightened interoceptive awareness of normal vestibular sensations.
Conversely, vestibular dysfunction frequently triggers anxiety and avoidance behavior. Persistent postural-perceptual dizziness (PPPD) is a functional vestibular disorder that commonly arises following an acute vestibular event (like vestibular neuritis or BPPV) and is maintained by anxiety and maladaptive behavioral responses.
Similarly, dizziness can be associated with nausea, particularly in motion sickness and Meniere’s attacks, and both symptoms can be addressed concurrently.
Q: What pharmacological treatments are available?
Vestibular suppressants and antiemetics are used for acute, severe vertigo:
- Meclizine (antihistamine): First-line for acute vestibular vertigo; reduces nausea and dizziness, mild sedation
- Prochlorperazine / promethazine: Stronger antiemetic and vestibular suppressant; useful in severe nausea
- Diazepam or lorazepam: GABA-A agonists that suppress central vestibular processing; effective but sedating, reserved for severe acute episodes
- Ondansetron: For nausea management specifically
Important caveat: vestibular suppressants should not be used long-term for peripheral disorders. Chronic use impairs central compensation — the brain’s ability to adapt to unilateral vestibular loss — and prolongs disability.
For Meniere’s disease: betahistine is widely used (particularly in Europe) as a histamine analogue that improves endolymphatic circulation; evidence is mixed but safety is favorable.
For pain co-occurring with vestibular conditions (e.g., cervicogenic dizziness), relevant analgesic options are covered in our pain relief category.
Q: What is vestibular rehabilitation therapy?
Vestibular rehabilitation therapy (VRT) is a specialized form of physical therapy designed to promote central vestibular compensation and improve balance through specific gaze stabilization and habituation exercises. It is evidence-based for unilateral peripheral vestibular dysfunction, post-concussive dizziness, and PPPD.
VRT works by repeatedly exposing the vestibular system to mismatch signals, forcing the cerebellum and brainstem to recalibrate — the same principle as why sailors adapt to sea conditions over time.
Q: What role does medication play in long-term dizziness management?
For most peripheral vestibular conditions, the goal of pharmacological treatment is short-term symptom control during acute episodes, not ongoing suppression. Overuse of vestibular suppressants is one of the most common errors in vestibular management — these drugs impair the CNS plasticity required for recovery and can prolong disability if used chronically for conditions that would otherwise resolve with rehabilitation.
There are exceptions: Meniere’s disease often requires longer-term pharmacological management (betahistine, diuretics), and PPPD may respond to SSRIs or SNRIs that reduce anxiety-driven vestibular hypervigilance.
For dizziness with a cardiovascular component — particularly presyncope and orthostatic hypotension — underlying causes such as dehydration, anemia, or autonomic neuropathy require direct treatment. Blood pressure management is essential, and some patients with orthostatic hypotension benefit from fludrocortisone or midodrine to support venous return and maintain cerebral perfusion.
Q: Are there surgical options for vestibular conditions?
For medically refractory Meniere’s disease, several surgical and procedural options exist:
- Endolymphatic sac procedures — Decompression or shunting to reduce endolymphatic pressure; less effective than some other options but preserves hearing
- Intratympanic gentamicin — Chemical ablation of vestibular function in the affected ear; highly effective at reducing vertigo attacks but causes permanent ipsilateral vestibular loss
- Labyrinthectomy — Surgical removal of the inner ear structures; used when hearing is already lost and medical options have failed
- Vestibular nerve section — Cuts the vestibular nerve while potentially preserving hearing; highly effective but requires neurosurgical approach
These interventions are reserved for patients whose quality of life is severely impacted despite comprehensive medical management, and decisions should involve a specialist neurotologist.
Q: When is dizziness a medical emergency?
Dizziness with any of the following warrants immediate emergency evaluation:
- Sudden severe headache (thunderclap headache) accompanying vertigo — potential subarachnoid hemorrhage
- Diplopia, dysarthria, dysphagia, or facial numbness — posterior circulation stroke
- Acute unilateral hearing loss with vertigo — possible cochlear ischemia
- Dizziness with chest pain, diaphoresis, or palpitations — cardiac arrhythmia or ischemia
- Loss of consciousness or near-syncope
- New neurological deficits (limb weakness, ataxia, coordination problems)
In these situations, the HINTS exam and immediate neuroimaging (preferably MRI with DWI) are the priority. Vestibular suppressants should not be administered before neurological evaluation in ambiguous presentations, as they can mask clinical signs.
Related symptoms of nausea, which frequently accompany acute vestibular events, can be addressed concurrently once serious central causes are excluded.
The Vestibular Disorders Association (VEDA) offers detailed condition-specific resources and a healthcare provider directory for vestibular specialists.