Dizziness is among the most common presenting complaints in primary care and emergency medicine, and among the most frequently mismanaged. In New York City, patients with dizziness and vertigo navigate a healthcare landscape that is simultaneously rich in specialist resources and prone to over-reliance on neuroimaging and medication in cases that are primarily vestibular in origin. For the majority of patients with true vertigo — the illusion of rotational movement — the underlying cause is a benign disorder of the inner ear that responds well to specific physical maneuvers or vestibular rehabilitation therapy. Understanding the most common causes of vertigo, how they are properly diagnosed, and what effective treatment looks like is essential information for patients who are trying to make sense of a disorienting and often frightening symptom.
Distinguishing Vertigo from Dizziness: A Clinical Distinction That Matters
Clinicians use the word “dizziness” broadly to encompass several distinct symptoms that have different causes and require different management. True vertigo is specifically the sensation that the environment is spinning or that the patient is rotating within a stationary environment — a compelling illusion of motion that is not occurring. It typically has an abrupt onset, often lasts seconds to minutes in its most common form, and may be accompanied by nausea, a sensation of fullness in the ear, or auditory symptoms. Presyncope — the lightheaded, faint-feeling sensation associated with reduced cerebral perfusion — is a different symptom entirely, typically caused by cardiac, vasovagal, or medication-related mechanisms. Disequilibrium, the sense of instability or imbalance when walking, is also distinct and often reflects central nervous system or musculoskeletal contributions rather than peripheral vestibular pathology. Differentiating these symptom types at the outset significantly narrows the diagnostic possibilities and guides appropriate evaluation.
Benign Paroxysmal Positional Vertigo: The Most Common Cause
Benign paroxysmal positional vertigo (BPPV) is by far the most common cause of vertigo in adults, accounting for approximately 20 to 30 percent of all dizziness diagnoses and a higher proportion in audiological and otolaryngological practice. BPPV occurs when otoconia — calcium carbonate crystals that normally sit on the otolithic membrane of the utricle — become dislodged and migrate into one of the semicircular canals of the inner ear. When the head moves in specific planes, the free-floating crystals create abnormal fluid movement in the canal, generating a false vestibular signal that the brain interprets as rotation. The result is brief but intense positional vertigo — typically lasting less than sixty seconds — triggered by specific head movements such as rolling over in bed, looking up, or bending forward.
The diagnosis of BPPV is made clinically through the Dix-Hallpike maneuver (for posterior and anterior canal BPPV) or the supine roll test (for horizontal canal BPPV), which provoke the characteristic torsional nystagmus that confirms the diagnosis. No imaging is required to diagnose BPPV, and ordering a CT or MRI in a patient with classic positional vertigo and positive Dix-Hallpike is, in most cases, an unnecessary expense and a delay in appropriate treatment. The treatment for BPPV is the canalith repositioning procedure — most commonly the Epley maneuver for posterior canal involvement — which guides the displaced crystals out of the semicircular canal and back toward the utricle through a series of head and body positions. A single Epley maneuver resolves BPPV in approximately 80 percent of patients, and most remaining cases resolve with one or two additional treatments. This is one of the most satisfying clinical interventions in medicine: a common, disabling condition treated effectively in a single office visit with no medication and no procedures.
Vestibular Neuritis and Labyrinthitis
Vestibular neuritis is an inflammatory condition of the vestibular nerve, most commonly attributed to viral or post-viral inflammation, that presents with sudden, severe, persistent vertigo lasting days to weeks. Unlike BPPV, the vertigo of vestibular neuritis is constant rather than positional, severe enough to cause significant nausea and vomiting during the acute phase, and accompanied by marked gait instability. Most patients with acute vestibular neuritis describe the experience as among the most incapacitating of their lives. The condition is unilateral — affecting one vestibular nerve while the other side remains intact — and the acute phase reflects the brain’s initial inability to reconcile the asymmetric vestibular input from the two sides.
The acute management of vestibular neuritis typically involves short-term use of vestibular suppressants (such as meclizine or diazepam) to reduce the severity of symptoms during the first twenty-four to seventy-two hours, followed by early mobilization and vestibular rehabilitation therapy. The vestibular suppressants should not be continued beyond the acute phase because they impair the central compensation process — the brain’s ability to recalibrate its vestibular processing to account for the asymmetric input — that is the actual mechanism of recovery. Patients are often prescribed these medications for weeks or months beyond the acute phase, which delays recovery rather than supporting it. Vestibular rehabilitation therapy, performed by a trained physical therapist or audiologist, uses progressive exercises that challenge the vestibular system and accelerate central compensation. When labyrinthitis is the diagnosis (concurrent hearing loss distinguishes it from pure vestibular neuritis), audiological monitoring and appropriate hearing management are indicated in addition to vestibular rehabilitation.
Ménière’s Disease: A Chronic Vestibular Condition
Ménière’s disease is characterized by the classic triad of episodic vertigo (attacks typically lasting twenty minutes to several hours), fluctuating low-frequency sensorineural hearing loss, and tinnitus and/or aural fullness in the affected ear. The underlying pathophysiology is believed to involve endolymphatic hydrops — an excess accumulation of endolymph, the fluid that fills the membranous labyrinth of the inner ear — though the precise mechanisms of why this occurs and how it produces the characteristic symptom complex remain incompletely understood. Ménière’s disease is a clinical diagnosis based on the symptom pattern; no single test confirms it, though audiometric monitoring of the characteristic low-frequency hearing fluctuation and electrocochleography may provide supportive evidence.
The management of Ménière’s disease is structured in tiers of invasiveness. Initial management typically includes dietary sodium restriction (usually to less than 1,500 mg per day), reduction of caffeine and alcohol, and a diuretic such as triamterene-hydrochlorothiazide to reduce endolymph volume. These conservative measures reduce attack frequency in a significant proportion of patients. For those with inadequately controlled attacks despite dietary and pharmacological management, intratympanic injection of corticosteroids or gentamicin represents a middle tier of intervention — more targeted and invasive than systemic medication, but preserving the vestibular function that ablative procedures sacrifice. Endolymphatic sac surgery and labyrinthectomy represent definitive surgical options for refractory cases. The hearing dimension of Ménière’s disease requires careful audiological monitoring, and patients who develop significant permanent hearing loss in the affected ear may eventually benefit from hearing rehabilitation, including hearing aids or, in severe cases, cochlear implantation.
When to Seek Evaluation and What to Expect
Any new onset of vertigo, particularly when severe, persistent, or associated with neurological symptoms such as double vision, slurred speech, dysphagia, severe headache, or unilateral limb weakness, warrants prompt medical evaluation to rule out central causes, including posterior circulation stroke. The audiovestibular profile — the HINTS examination (Head Impulse, Nystagmus, Test of Skew) — is a validated bedside screening tool that is more sensitive and specific for distinguishing peripheral from central vertigo than brain MRI in the acute setting, though it requires clinical expertise to perform correctly. Patients who are evaluated in an emergency setting and told their imaging was normal should understand that normal imaging does not exclude a peripheral vestibular diagnosis; it excludes certain central diagnoses. A normal MRI is not a diagnosis — it is the starting point for appropriate vestibular evaluation.
Comprehensive vestibular evaluation typically includes videonystagmography (VNG), which assesses oculomotor function and the integrity of both horizontal semicircular canals; vestibular evoked myogenic potentials (VEMP), which evaluate otolith function; and in some cases rotary chair testing. These tests, combined with audiometric evaluation, provide a detailed picture of vestibular function that guides diagnosis and treatment planning. If you are dealing with recurrent dizziness or vertigo in New York City and have not yet had a formal vestibular evaluation, that is the appropriate next step — not additional imaging.