A normal MRI is the expected result in vestibular migraine

The scan came back clean, and the floor still tilts

The portal message shows up on a Tuesday afternoon: MRI brain with and without contrast, impression unremarkable. Three weeks earlier you were gripping the bathroom sink while the room slid left. Two days ago a grocery aisle did the same thing under fluorescent light. Somewhere in the stack there's also a normal audiogram and a VNG the technician described as unremarkable.

So what was it?

For a lot of people with vestibular migraine, this is where the workup stalls. The tests everyone was waiting on found nothing, and nothing feels like an answer. Some people go quiet at the next appointment. Some start to wonder whether they imagined the whole thing. Both reactions make sense, and both read the evidence backwards.

Will an MRI show vestibular migraine?

No. And in vestibular migraine, that's the result you'd expect.

Vestibular migraine (VM) is a clinical diagnosis. No scan finding, blood marker or balance-test pattern confirms it. Clinicians make the diagnosis from your history: how the episodes behave, how long they last, and whether they come with migraine features. The criteria used internationally were published jointly by the Bárány Society and the International Headache Society and appear in the ICHD-3 appendix. Every line of them is a symptom.

We call this the expected-normal rule. In a VM workup, normal imaging and normal vestibular tests count as supporting evidence. They clear away the conditions that would explain the dizziness some other way, and a clinician needs that done before landing on VM. A clean MRI moves the workup forward.

Why a normal result gets read as nothing wrong

Most of us learn medical testing from cases where the test is the answer. A fracture shows on an X-ray. A strep swab comes back positive or negative. So when a dizziness workup comes back clean, the natural conclusion is that there was nothing there to find.

VM breaks that assumption in two places. First, the standard dizziness tests are designed to find structural damage or a failing inner ear, and VM usually leaves neither behind. Second, the symptom that would make the migraine link obvious is often missing. Stanford's vestibular migraine patient materials put VM without headache at roughly half of cases. Someone having spinning, rocking or motion-sick spells with no head pain may never mention their migraine history. The radiologist reading the scan has no way to see it.

That's where people drop out of care. The scans come back normal and the headache link is invisible. And the most useful evidence, the pattern of the episodes themselves, never gets collected.

What each test is actually checking

Every test in a dizziness workup answers a specific question. None of those questions is whether this is migraine.

An MRI looks at brain structure: stroke, multiple sclerosis lesions, tumors such as a vestibular schwannoma on the balance nerve, and Chiari malformation. VM doesn't change brain structure in a way an MRI can see. Reports sometimes mention small white matter spots, which are more common in people with migraine. They don't diagnose VM and usually aren't what's causing the dizziness.

VNG (videonystagmography) tracks eye movements to test the inner ear and the pathways that connect it to the brain, often with caloric testing of each ear. In VM it's frequently normal, or it shows nonspecific findings that don't point to a particular inner-ear disorder. An audiogram measures hearing. In a dizziness workup its main job is to look for a low-frequency hearing loss that would point toward Ménière's disease instead.

One workup, walked through

Here's a hypothetical case that follows the usual sequence. Someone in their late thirties has had migraines since their twenties, mostly under control. Over a year, a new problem appears: episodes where the floor feels like a boat deck, lasting from twenty minutes to most of a day, often set off by scrolling, busy patterns or car rides. Some come with a headache. Many don't.

Primary care orders an MRI to rule out anything serious. Normal. An ENT orders a VNG and an audiogram. Normal and normal. The inner ear looks fine, the ENT says, so see neurology. The appointment is months out.

At neurology, the clinician asks what the criteria need answered. How many episodes? How long do they last? Any light and sound sensitivity? Visual aura? Asked cold, most people guess: a lot, it varies, sometimes. Answers like that can't be checked against the thresholds, so the visit ends at probable vestibular migraine or another referral.

Now run the same visit with a log in hand. Fourteen episodes in three months. Durations from 20 minutes to 9 hours. Light and sound sensitivity together in nine of them, headache in five. Each of those numbers lines up with a line in the criteria. The patient and the normal scans haven't changed, but the path to an answer is much shorter.

What to do after a normal result

Treat the normal report as a finished step in the workup. Then push on the next one.

At the follow-up, ask directly whether vestibular migraine is being considered. Mention any migraine history, even if your dizzy spells come with no headache at all, because that history is one of the criteria. If you haven't seen a neurologist, headache specialist or neuro-otologist, ask for that referral.

Then start logging every episode. Record when it started and ended, and what kind of dizziness it was (spinning, rocking, motion-triggered, a sense that the ground is tilting). Note any trigger. Note whether there was a headache, light and sound sensitivity, or visual aura. Write down what you took. Also record how long it took to feel normal again, since many people with VM describe a heavy, foggy recovery tail that outlasts the dizziness. Bring a one-page summary rather than scrolling through your phone in the exam room.

Where Postdrome fits in a VM workup

Postdrome was built around the parts of an attack most trackers skip: the episodes that come without a headache, and the hours after one ends. In a vestibular migraine workup, those are the parts that count. Dizziness episodes, light and sound sensitivity, and recovery time all go on one continuous timeline. Aura Mode is there for logging when looking at a bright screen makes things worse.

Your data stays on your phone and exports when you're ready to hand it to a clinician. It's a one-time lifetime price, with no subscription renewing in the background.

A neurologist can't rebuild three months of episodes from memory in a short appointment. Neither can you. A log can.