Vertigo is tested through a combination of physical exam maneuvers and, when needed, specialized lab-based vestibular tests. Most cases can be diagnosed in a doctor’s office using specific head and eye movement tests that take just minutes. More complex or persistent cases may require equipment-based testing or brain imaging to pinpoint the cause.
Physical Exam Tests Done in the Office
The first round of testing is hands-on. Your doctor will watch how your eyes move in response to specific head positions and movements, because involuntary eye movements called nystagmus are the hallmark sign that something in the balance system isn’t working correctly. These physical tests are fast, free, and remarkably accurate when performed by someone experienced.
The Dix-Hallpike Maneuver
This is the go-to test for benign paroxysmal positional vertigo (BPPV), the most common cause of vertigo. You’ll sit on an exam table while your doctor turns your head 45 degrees to one side, then quickly lays you back so your head hangs slightly off the edge. If you have BPPV, this triggers a brief but intense spinning sensation along with visible nystagmus, typically after a short delay of two to three seconds. The eye movements and dizziness usually last about 15 to 30 seconds and almost always resolve within two minutes.
A positive result shows upward or rotatory nystagmus, which confirms that tiny calcium crystals in your inner ear have drifted into one of the semicircular canals. The test is repeated on both sides to determine which ear is affected. It can feel unpleasant in the moment, but the dizziness passes quickly.
The HINTS Exam
When vertigo is continuous rather than triggered by position changes, doctors use a three-part eye exam called HINTS to distinguish between an inner ear problem and something more serious like a stroke. This exam is especially important in emergency settings, where it has proven to be 100% sensitive and 96% specific for detecting stroke as a cause of vertigo. That makes it more accurate than early MRI in some cases.
The three components are:
- Head impulse test: Your doctor holds your head still, then makes a quick small turn while you stare at their nose. They’re watching whether your eyes stay locked on target or have to make a corrective jump back.
- Nystagmus observation: You look left, right, and center while your doctor checks whether your involuntary eye movements always go in the same direction or change direction with gaze.
- Test of skew: Your doctor covers and uncovers each eye, watching for a vertical shift in eye alignment.
A peripheral (inner ear) cause typically shows a corrective eye jump on the head impulse test, nystagmus that beats in one fixed direction, and no vertical misalignment. A central cause like stroke shows the opposite pattern. If the findings point toward a central cause, imaging follows immediately.
Balance and Stepping Tests
Simpler screening tests can reveal whether one side of the vestibular system is weaker than the other. In the Romberg test, you stand with your feet together and eyes closed while your doctor watches for swaying or falling to one side. The Fukuda stepping test has you march in place with your eyes closed for 50 steps. Rotating more than 30 degrees or drifting more than half a meter from your starting position suggests an imbalance between the two inner ears.
Lab-Based Vestibular Testing
When office exams don’t give a clear answer, or when your doctor needs to measure exactly how much function each ear has, you’ll be referred for equipment-based testing. These are typically done in an audiology or neurology clinic.
Videonystagmography (VNG)
VNG is the most common formal vestibular test. You wear special goggles with a built-in camera that records your eye movements in a dark room. The test has three parts. During ocular testing, you follow moving lights and stare at fixed targets without moving your head. During positional testing, the examiner moves your head and body into different positions while the camera checks for nystagmus. The final part, caloric testing, is the most distinctive: cool and then warm water or air is directed into each ear canal separately. The temperature change stimulates the inner ear, and the resulting eye movements reveal whether one ear responds more weakly than the other. If your eyes don’t move as expected with the temperature change, it points to damage in that ear’s balance system.
The entire VNG battery takes about 60 to 90 minutes. Caloric testing can temporarily trigger dizziness and nausea, but symptoms resolve within minutes.
Rotary Chair Testing
For this test, you sit in a motorized chair in a dark room while it rotates at controlled speeds. Sensors track your eye movements during the rotation. The test measures three things: gain (how strongly your eyes compensate for head movement), phase (the timing relationship between head and eye movement), and symmetry (whether the response is equal in both directions). When the balance system is working perfectly, eye velocity matches head velocity for a gain value of 1.0. Peripheral vestibular damage reduces this value below normal ranges.
Rotary chair testing is particularly useful for detecting problems that affect both ears, which caloric testing can miss, and for monitoring how well someone is compensating for vestibular damage over time.
VEMP Testing
Most vestibular tests evaluate the semicircular canals, which detect rotation. VEMP (vestibular evoked myogenic potential) testing evaluates a different part of the inner ear: the otolith organs, which detect gravity and linear motion like going up in an elevator. During the test, sensors placed on your neck or near your eyes record small muscle responses triggered by loud clicks or tones played through headphones. The strength and timing of these muscle contractions reveal whether the otolith organs are functioning normally. VEMP is often ordered alongside VNG when conditions like superior canal dehiscence or Meniere’s disease are suspected.
Hearing Tests for Vertigo
Because the hearing and balance organs share the same inner ear structure, hearing loss patterns can help diagnose specific vestibular conditions. A standard hearing test (audiogram) is part of the workup for Meniere’s disease, which requires documented low- to mid-frequency hearing loss in the affected ear along with at least two spontaneous vertigo episodes lasting 20 minutes to 12 hours and fluctuating symptoms like tinnitus, hearing changes, or ear fullness. Without the hearing test confirming that specific pattern of loss, a definite Meniere’s diagnosis can’t be made.
When Imaging Is Needed
MRI or CT scans aren’t routine for vertigo. Most cases are caused by inner ear problems that imaging simply can’t see. Brain imaging is reserved for situations where the clinical picture suggests something beyond the inner ear. According to Johns Hopkins guidelines, the red flags that support ordering imaging include:
- Neurological deficits beyond hearing changes, such as numbness, weakness, difficulty speaking, or trouble swallowing
- Strong risk factors for stroke, including uncontrolled high blood pressure, diabetes, or a history of cardiovascular disease
- Progressive, asymmetric hearing loss that worsens over time in one ear
- Asymmetric findings on coordination tests, like difficulty with finger-to-nose testing on one side
- Signs pointing to a central cause without a clear explanation
When imaging is ordered, MRI with contrast is preferred over CT because it provides much better detail of the brainstem, cerebellum, and inner ear structures. CT may be used in emergency settings when speed matters or MRI isn’t available.
What to Expect at Your Appointment
Before any physical testing, your doctor will ask detailed questions about your episodes: how long each one lasts, what triggers them, whether the room spins or you feel like you’re swaying, and whether you have hearing changes, ear pressure, or headaches. The duration of your episodes is one of the most useful diagnostic clues. BPPV episodes last under two minutes. Meniere’s attacks last 20 minutes to 12 hours. Vestibular neuritis causes continuous vertigo lasting days.
You’ll typically be asked to avoid caffeine, alcohol, and certain medications for 24 to 48 hours before formal vestibular testing, as these can affect your inner ear responses. Wear comfortable clothing, since several tests involve lying down and changing positions. Bring someone to drive you home if you’re having lab-based testing, because temporary dizziness after caloric or rotary chair tests is common.