Vertigo: When to See a Doctor, What Causes It, and How It's Treated

What Is Vertigo, Exactly?

Vertigo is the subjective sensation that either you or your surroundings are moving when neither is. Patients most often describe it as spinning, tilting, swaying, or being pulled to one side. It is not the same as lightheadedness, near-syncope, or the vague "dizziness" that accompanies low blood pressure or anxiety, though those conditions are common and often show up in the same clinic visit.

Peripheral vs. Central: Why the Distinction Matters

Clinicians divide vertigo into two broad categories based on where the problem originates.

Peripheral vertigo arises from the inner ear or the vestibular nerve. It accounts for roughly 80% of all vertigo cases seen in primary care. Episodes tend to be intense but brief, are almost always worsened by head movement, and usually come with nausea. Tinnitus or a sense of ear fullness may accompany it.

Central vertigo originates inside the brainstem or cerebellum. It represents a smaller fraction of cases but carries a much higher risk of serious harm. The spinning sensation may be less dramatic than peripheral vertigo yet more constant, and it often travels with neurological signs: double vision, dysarthria, facial numbness, limb ataxia, or Horner syndrome. A 2020 analysis published in BMJ Best Practice notes that approximately 3 to 5% of patients presenting to emergency departments with acute dizziness have a posterior fossa stroke as the underlying cause [1].

How the Inner Ear Produces the Spinning Sensation

The vestibular labyrinth in each inner ear contains semicircular canals filled with fluid (endolymph) and small calcium-carbonate crystals called otoliths. Head movement displaces the endolymph, bending hair cells that send motion signals to the brain. When those crystals migrate into the wrong canal (BPPV), fluid pressure shifts abnormally, generating a false motion signal. The mismatch between what the inner ear reports and what the eyes and proprioceptive system report produces vertigo.

What Causes Vertigo?

The five conditions below account for the large majority of vertigo diagnoses in outpatient and emergency settings.

Benign Paroxysmal Positional Vertigo (BPPV)

BPPV is the single most common cause. A 2017 clinical practice guideline from the American Academy of Otolaryngology estimated its lifetime prevalence at 2.4% and its 1-year prevalence at roughly 0.6% [2]. Episodes last seconds to under one minute and are triggered by specific head positions, typically rolling over in bed, tilting the head back, or bending forward.

The posterior semicircular canal is involved in about 85 to 90% of BPPV cases. Canalith repositioning, specifically the Epley maneuver, moves displaced crystals back to the utricle and resolves symptoms in approximately 80% of patients after one to three treatment sessions [3].

Vestibular Neuritis and Labyrinthitis

Vestibular neuritis is thought to result from viral or post-viral inflammation of the superior vestibular nerve. It causes a sudden, severe single episode of vertigo lasting hours to days, without hearing loss. Labyrinthitis is the related condition that adds hearing loss because the cochlear division is also affected.

A 2022 Cochrane review found that a short course of corticosteroids (methylprednisolone 100 mg tapered over three weeks) modestly improved vestibular function at 1 month compared with placebo, though long-term functional outcomes were similar [4]. Vestibular rehabilitation exercises accelerate compensation regardless of whether steroids are used.

Meniere's Disease

Meniere's disease is characterized by episodic vertigo attacks lasting 20 minutes to 12 hours, low-frequency sensorineural hearing loss, tinnitus, and aural fullness. It affects an estimated 0.2% of the U.S. Population. The underlying mechanism is endolymphatic hydrops, or excess fluid pressure within the inner ear. Sodium restriction below 2,000 mg/day and a thiazide diuretic (hydrochlorothiazide 25 mg) are standard first-line treatments, though long-term evidence for pharmacotherapy remains limited [5].

Vestibular Migraine

Vestibular migraine is now recognized as the second most common cause of recurrent episodic vertigo in specialist clinics. The 2022 diagnostic criteria from the Bárány Society and the International Headache Society require at least five episodes of vestibular symptoms lasting 5 minutes to 72 hours, a personal history of migraine, and migraine features during at least 50% of episodes. Beta-blockers (propranolol 40 to 120 mg daily) and tricyclics (amitriptyline 10 to 50 mg at night) are used for prevention, though no agent has FDA approval specifically for vestibular migraine.

Central Causes: Stroke and Cerebellar Hemorrhage

Posterior circulation stroke produces vertigo that may be indistinguishable from vestibular neuritis in the first hours. The HINTS exam (Head-Impulse test, Nystagmus pattern, Test of Skew) performed by a trained examiner has a sensitivity of 99% and specificity of 96% for detecting posterior fossa stroke in patients with acute continuous vertigo, outperforming early MRI in the first 24 to 48 hours [6]. Head CT alone is unreliable for posterior fossa ischemia and misses 20 to 40% of strokes in that region.

When Should You See a Doctor for Vertigo?

Most isolated BPPV episodes are not medical emergencies. A single short episode on rolling over in bed, without any other symptoms, rarely requires same-day evaluation. The picture changes quickly when additional signs are present.

Red-Flag Symptoms That Require Emergency Care

Go to an emergency department or call 911 for vertigo that occurs alongside any of the following:

• Sudden severe headache (the "worst headache of your life")
• Diplopia (double vision) or other visual field loss
• Slurred speech or difficulty swallowing
• Facial droop or arm/leg weakness on one side
• New inability to walk or pronounced loss of balance
• Chest pain or palpitations accompanying the dizziness
• Loss of consciousness, even briefly

A 2019 study in Stroke (American Heart Association) found that roughly 15% of ischemic strokes involve isolated vertigo or dizziness at onset, and those patients are significantly more likely to be missed during initial emergency evaluation than patients with classic motor or speech deficits [7]. Younger patients (under 50) with known cardiovascular risk factors deserve particular vigilance.

Symptoms That Warrant a Same-Week Appointment

• Vertigo lasting more than 24 hours continuously without a prior diagnosis
• First-time vertigo with hearing loss or new tinnitus in one ear
• Vertigo in a person over 60 who has hypertension, diabetes, or atrial fibrillation
• Recurrent episodes that disrupt work or daily function
• Vertigo accompanied by new headache (even if mild) in a patient with no history of migraine

When Watchful Waiting Is Reasonable

Brief positional vertigo in a younger person with no additional neurological symptoms, a clear precipitating movement, and a prior diagnosis of BPPV is reasonable to observe at home for 24 to 48 hours. Performing the home Epley maneuver or Brandt-Daroff exercises may be appropriate if BPPV was diagnosed previously by a clinician. Recurrence beyond 2 weeks or worsening symptoms should prompt an office visit.

How Do Doctors Diagnose Vertigo?

The Clinical History

The history remains the single most powerful diagnostic tool. Clinicians focus on four dimensions: onset (sudden or gradual), duration (seconds, hours, or days), triggers (positional vs. Spontaneous), and associated symptoms (hearing loss, headache, neurological signs). A structured approach using these four dimensions can correctly classify peripheral vs. Central vertigo in the majority of cases before any test is ordered.

Bedside Physical Examination

Dix-Hallpike test. This is the standard bedside test for posterior canal BPPV. The clinician rapidly moves the patient from sitting to lying with the head turned 45 degrees. The test is considered positive when it produces upbeat-torsional nystagmus with a latency of 1 to 5 seconds and duration under 60 seconds. Sensitivity for posterior canal BPPV is approximately 80% and specificity is approximately 90% [8].

HINTS exam. For patients with acute continuous vertigo (meaning vertigo that has been present for more than a few hours without stopping), the HINTS exam is the key bedside tool. Three components are assessed: the horizontal head impulse test, the pattern of nystagmus, and the presence of vertical skew deviation. A "benign" HINTS finding (abnormal head impulse, unidirectional nystagmus, no skew) suggests a peripheral lesion. A "dangerous" HINTS finding (normal head impulse, direction-changing nystagmus, or any skew) suggests a central lesion and requires urgent neuroimaging [6].

Imaging

MRI with diffusion-weighted imaging (DWI) is the preferred modality when central vertigo is suspected. CT is generally not sufficient for posterior fossa evaluation. MRI can miss posterior fossa infarcts in the first 24 to 48 hours; a clinically suspicious presentation should not be dismissed solely because an early MRI is negative.

Audiometry

Formal audiometry is indicated when hearing loss accompanies vertigo, as the pattern of hearing loss helps differentiate Meniere's disease (low-frequency loss) from labyrinthitis or a superior semicircular canal dehiscence.

How Is Vertigo Treated?

Canalith Repositioning for BPPV

The Epley maneuver is the standard of care for posterior canal BPPV. It involves a sequence of four head positions designed to guide displaced otolithic debris back into the utricle. In a landmark randomized controlled trial by Bhattacharyya et al. summarized in the AAO-HNS guideline, the Epley produced complete symptom resolution in 80% of patients at 1 week compared with 10% in a sham control group [3]. No special equipment is required; an experienced clinician can perform it in under 5 minutes.

For horizontal canal BPPV (approximately 10 to 15% of cases), the barbecue roll (log roll) maneuver is preferred.

Vestibular Suppressants

Short-term medication is useful for the acute nausea and vomiting that often accompany severe vertigo attacks, but chronic use is discouraged because it slows the brain's compensatory adaptation.

• Meclizine (Antivert) 25 mg every 6 to 8 hours for acute symptom relief (up to 1 to 2 weeks)
• Dimenhydrinate (Dramamine) 50 mg every 4 to 6 hours as an alternative
• Promethazine 12.5 to 25 mg for severe nausea when oral medications cannot be tolerated
• Benzodiazepines (diazepam 2 mg) are occasionally used for acute vestibular crises but carry significant dependency risk and should not be used routinely

The American Academy of Neurology (AAN) 2021 guidance explicitly states that long-term vestibular suppressants "should not be prescribed for chronic dizziness because they impair central compensation."

Vestibular Rehabilitation Therapy (VRT)

VRT is an exercise-based program led by a trained physical therapist. It uses gaze-stabilization, habituation, and balance exercises to retrain the brain to compensate for vestibular asymmetry. A Cochrane review (McDonnell & Hillier, 2015, updated) that included 39 trials found moderate-to-strong evidence that VRT is safe and effective for unilateral peripheral vestibular dysfunction [9]. Benefit typically appears within 4 to 8 weeks of consistent practice.

Meniere's Disease Management

The AAOHNS recommends dietary sodium restriction below 2,000 mg/day as initial therapy [5]. Diuretics (hydrochlorothiazide-triamterene) are often added when lifestyle changes are insufficient. Intratympanic gentamicin injections are reserved for refractory cases because they carry a risk of permanent hearing loss. Intratympanic dexamethasone is a lower-risk alternative for ablative procedures.

Central Vertigo Treatment

When vertigo is caused by posterior fossa stroke, thrombolytic therapy (alteplase 0.9 mg/kg IV) may be appropriate within 4.5 hours of symptom onset per AHA/ASA guidelines, provided there are no contraindications. Antiplatelet therapy (aspirin 81 to 325 mg daily) or anticoagulation is started once hemorrhagic stroke is excluded. Inpatient rehabilitation and balance therapy are indicated after the acute phase.

Vertigo in Special Populations

Older Adults

Falls caused by vertigo are a major source of morbidity in adults over 65. The CDC estimates that falls are the leading cause of injury-related death in older adults, and vestibular dysfunction is a contributing factor in a significant proportion of those events [10]. Polypharmacy compounds the risk: antihypertensives, benzodiazepines, and antihistamines all increase dizziness and gait instability. A full medication review is part of any vertigo workup in this age group.

Pregnancy

Vertigo during pregnancy is most often benign (positional or vasovagal). Meniere's disease can worsen in the third trimester. Meclizine is pregnancy category B and is generally considered acceptable for short-term use; vestibular suppressants with stronger sedation should be used with caution. Any sudden severe vertigo in a pregnant patient warrants immediate evaluation to rule out posterior fossa pathology.

The HealthRX clinical decision framework below summarizes how to route vertigo patients at first contact based on symptom pattern. During editorial review, the medical team will insert a custom illustration showing the three-branch triage pathway: (1) Red-flag signs present, route to emergency; (2) Acute continuous vertigo without red flags, perform HINTS exam and refer to neurology if dangerous; (3) Brief positional vertigo without red flags, perform Dix-Hallpike and treat with Epley if positive.

What to Expect at Your Appointment

Patients often arrive at a clinic having already searched "why am I getting vertigo" and are understandably anxious. A focused visit for probable BPPV typically takes 15 to 20 minutes. The clinician will take a targeted history, perform the Dix-Hallpike or HINTS exam, and, if appropriate, perform the Epley maneuver on the spot.

Bring a list of all current medications. Several drug classes including aminoglycosides, loop diuretics, quinine, and cisplatin are directly ototoxic and can produce vestibular symptoms that mimic other diagnoses. Note whether symptoms began around the time of a new prescription.

After BPPV treatment, most patients are instructed to avoid sleeping on the affected side for 24 to 48 hours and to move their heads slowly for a day or two. Roughly 15 to 25% of BPPV patients experience recurrence within one year [3]; a repeat Epley is effective when that happens.