Vertigo is diagnosed primarily through a detailed medical history and a series of physical exam maneuvers, not through a single definitive test. Your doctor will ask specific questions about your symptoms, watch your eye movements during positioning tests, and use the pattern of results to narrow down the cause. Imaging like MRI is reserved for cases where a stroke or other central nervous system problem is suspected.
What Your Doctor Will Ask
The diagnostic process starts with questions designed to classify what kind of vertigo you’re experiencing. Your doctor will likely ask something like, “Does it feel like the room is spinning around you?” or “Do you feel like you are the one spinning?” These aren’t casual questions. True vertigo, a false sensation of movement, points toward a different set of causes than lightheadedness or unsteadiness.
The timeline of your symptoms is one of the most useful pieces of the puzzle. Your doctor will want to know whether your vertigo is a one-time event or keeps coming back, how long each episode lasts, and whether it’s getting worse. These details matter because different conditions produce distinctly different patterns:
- Episodes lasting seconds to a few minutes that keep recurring are frequently linked to BPPV (benign paroxysmal positional vertigo), especially if triggered by rolling over in bed or looking up.
- A single episode lasting minutes to hours may point to vestibular migraine or, in more serious cases, a transient ischemic attack (a brief interruption of blood flow to the brain).
- Episodes lasting days can occur with vestibular neuritis (inflammation of the inner ear nerve) or, less commonly, a tumor or brain lesion.
You’ll also be asked about accompanying symptoms. Ringing in the ear, hearing loss, or a feeling of fullness in one ear suggests Ménière’s disease. Headache, light sensitivity, or visual disturbances point toward vestibular migraine. Double vision, slurred speech, difficulty swallowing, or numbness raise concern for a stroke or other central nervous system cause, and these are treated as red flags that change the diagnostic path significantly.
The Dix-Hallpike Maneuver
If BPPV is suspected, the most important physical test is the Dix-Hallpike maneuver. You sit on an exam table, and the doctor turns your head 45 degrees to one side, then quickly lowers you backward so your head hangs slightly off the edge. This repositioning is designed to dislodge tiny calcium crystals in your inner ear and provoke the vertigo so the doctor can observe your eye movements.
What the doctor watches for is nystagmus, an involuntary rhythmic jerking of the eyes. In posterior canal BPPV (the most common type), the nystagmus is torsional and upward-beating, meaning your eyes rotate and flick upward toward your forehead. There’s typically a 2- to 5-second delay after you’re positioned before the nystagmus starts, though in rare cases the delay can be up to 40 seconds. The eye movements last less than a minute and fade if the test is repeated. That combination of delay, brief duration, and fatigue with repetition is what confirms BPPV and distinguishes it from more concerning central causes, where nystagmus tends to start immediately, last longer, and not fade.
The HINTS Exam for Acute Vertigo
When someone arrives with sudden, continuous vertigo that has lasted hours or days, the critical question is whether the cause is in the inner ear (peripheral) or in the brain (central, often a stroke). The HINTS exam is a three-part bedside test designed to answer this. It stands for Head Impulse, Nystagmus, and Test of Skew.
During the head impulse test, the doctor quickly turns your head to one side while you focus on their nose. If your eyes can’t stay locked on the target and snap back to it after the head turn, that “catch-up” movement suggests a peripheral problem, which is actually the more reassuring finding. A normal result, where your eyes stay perfectly locked on the target, is paradoxically more concerning because it can indicate the brain is compensating for a stroke.
The nystagmus portion checks whether your eye jerking changes direction when you look in different directions (a central red flag), and the test of skew looks for vertical misalignment of your eyes, another sign of a brainstem problem.
The HINTS exam is remarkably effective. It detects strokes causing vertigo with about 96% sensitivity, and one major study found it outperformed early MRI, which misses 20% to 35% of central vertigo cases. MRI with diffusion-weighted imaging catches only about 80% of strokes within the first 24 hours. This means a skilled bedside exam can actually be more reliable than brain imaging in the acute setting.
Vestibular Function Testing
If the diagnosis isn’t clear from the history and bedside exam, your doctor may refer you for videonystagmography (VNG). This is a more detailed assessment performed in a clinic, usually by an audiologist or ENT specialist. You wear goggles that track your eye movements with infrared cameras while you go through several tasks.
The caloric test is the centerpiece. Warm and then cool air or water is delivered into each ear canal. The temperature change stimulates the balance organ on that side, and each ear should produce a similar response. If one ear responds significantly less than the other, it confirms that ear has reduced vestibular function. This asymmetry is calculated using a formula that compares the combined responses from each side.
Other parts of VNG include tracking tests, where you follow a dot moving across a screen. The test measures how smoothly your eyes track the target and how quickly and accurately they jump between points. Abnormal results on these portions, such as eye-jumping speeds below 275 degrees per second or tracking accuracy outside the 80% to 134% range, can point toward central nervous system involvement rather than an inner ear problem.
Hearing Tests
A pure-tone hearing test is a standard part of most vertigo workups, particularly when Ménière’s disease or labyrinthitis is on the table. Both conditions tend to affect younger patients and produce hearing loss that is unilateral or noticeably different between ears.
For a definite diagnosis of Ménière’s disease, hearing tests must document low- to mid-frequency hearing loss in the affected ear on at least one occasion around the time of a vertigo episode. This specific pattern, where lower-pitched sounds are harder to hear, helps distinguish Ménière’s from other causes. The hearing loss in Ménière’s also fluctuates over time, which is itself a diagnostic clue. By contrast, vestibular neuritis typically causes vertigo without hearing loss, so a normal hearing test in someone with acute prolonged vertigo helps point toward that diagnosis instead.
Diagnosing Vestibular Migraine
Vestibular migraine is one of the trickier diagnoses because there’s no single test that confirms it. Instead, it’s diagnosed by meeting a specific set of criteria. You need at least five episodes of moderate to severe vertigo lasting between 5 minutes and 72 hours, a current or past history of migraine headaches, and migraine features occurring with at least half of the vertigo episodes. Those features include one-sided pulsating headache, sensitivity to light and sound, or visual aura.
Vertigo is rated “moderate” if it interferes with daily activities and “severe” if it stops you from continuing them altogether. The diagnosis also requires that no other vestibular condition better explains the symptoms, which is why ruling out BPPV, Ménière’s disease, and other conditions is part of the process.
When Imaging Is Needed
Most people with vertigo do not need an MRI or CT scan. Imaging is ordered when specific red flags are present: neurological symptoms beyond vertigo (such as weakness, numbness, or difficulty speaking), strong risk factors for stroke, hearing loss that is progressive and worse on one side, abnormal cerebellar findings on exam, or signs pointing to a central cause without a clear explanation.
Johns Hopkins guidelines emphasize that imaging should be targeted rather than routine. An MRI is the preferred study when needed because CT scans are poor at detecting posterior fossa strokes, which are the type most likely to cause vertigo.
Which Specialist You Might See
Many cases of vertigo are diagnosed and treated by a primary care doctor, especially straightforward BPPV. When referral is needed, ENT physicians and neurologists approach the problem differently. ENT specialists generally have better access to vestibular function testing equipment like VNG, and detailed vestibular testing changes the diagnosis in roughly 54% of cases in one study. Neurologists tend to refer more patients onward to interdisciplinary dizziness clinics and to the emergency department, particularly for acute vertigo presentations.
Research suggests that having both specialties involved reduces the rate of unexplained vertigo from 20-30% down to about 14%. If your vertigo involves hearing symptoms, an ENT referral is a natural fit. If neurological symptoms are prominent or migraine is suspected, a neurologist may be more appropriate. In complex or persistent cases, a multidisciplinary dizziness clinic offers the most thorough evaluation.