What Causes Vertigo? A Practical Guide for Adults

Vertigo is one of the most common reasons adults visit emergency departments and primary care offices in the United States. It is also one of the most consistently mis-diagnosed. Roughly 80 percent of cases have an identifiable inner-ear cause. Roughly 5 to 10 percent are neurologic or central. The remaining slice is cardiovascular, medication-related, or psychiatric. Knowing which category you are in is more than half of the treatment.

The first thing to understand is that vertigo is a specific symptom, not a general one. Vertigo is the illusion of movement — usually spinning, but sometimes tilting or rocking. It is not the same as lightheadedness, near-fainting, imbalance, or brain fog. Those symptoms overlap with vertigo but come from different mechanisms. When you tell a clinician you are dizzy, the very first question they should ask is: what exactly do you mean by dizzy? The answer narrows the differential dramatically.

There are five common causes of vertigo in adults. Together they account for the vast majority of cases seen in specialty vestibular clinics.

The most common cause is BPPV, or benign paroxysmal positional vertigo. It is a mechanical problem in the inner ear: tiny calcium crystals migrate into the wrong semicircular canal, and head movement now produces a burst of false rotation signals. BPPV episodes are brief — 15 to 60 seconds — and triggered by specific head positions like rolling over in bed, looking up, or bending down. It is dramatic, exceptionally common, and one of the most treatable conditions in medicine. A proper repositioning maneuver, most commonly the Epley, resolves it in roughly 80 percent of patients in a single visit.

The second most common cause is vestibular migraine. Episodes last 5 minutes to 72 hours, are recurring, and are often accompanied by motion sensitivity, light sensitivity, and — about half the time — a headache. The other half of episodes have no headache at all, which is why vestibular migraine is missed so often. It is a whole-brain sensitivity phenomenon, not an inner-ear structural problem, and it responds to a combination of lifestyle stabilization, vestibular rehabilitation, and appropriate preventive medication.

The third is vestibular neuritis, or its close relative labyrinthitis. This is sudden inflammation of one of the vestibular nerves, most often after a viral illness. The onset is abrupt, the vertigo is continuous for days rather than intermittent, and it can be genuinely disabling in the first week. Recovery takes weeks to months, and the best outcomes come from structured vestibular rehab starting within the first 2 to 4 weeks. Labyrinthitis is the same picture plus hearing changes.

The fourth is Meniere's disease. Episodes last 20 minutes to several hours, are accompanied by hearing loss and tinnitus in the affected ear, and involve a sense of ear fullness. Meniere's is less common than the first three, is a lifelong condition, and is managed with a combination of dietary changes, medication, and vestibular rehab for the between-episode residual symptoms.

The fifth is persistent postural-perceptual dizziness, or PPPD. This is chronic dizziness — lasting three months or more — that persists after some other vestibular event has resolved. The most common trigger is an episode of BPPV, vestibular neuritis, or vestibular migraine. PPPD is not a structural problem; it is a sensitization state in which the brain has essentially learned to be dizzy and needs to be retrained. It is the most common cause of chronic dizziness in adults and responds well to graded vestibular rehab, often combined with cognitive-behavioral strategies.

Beyond those five, there is a longer list of less-common causes: superior canal dehiscence, bilateral vestibular loss, vestibular schwannoma, orthostatic hypotension, cervicogenic dizziness, medication side effects, and rare central causes such as posterior circulation stroke. The last one is the reason a proper evaluation always rules out central causes first.

The pattern of the episodes is by far the most useful diagnostic clue.

If your vertigo lasts seconds and is triggered by head position, it is almost certainly BPPV. If your vertigo lasts hours, recurs, and is accompanied by motion and light sensitivity, it is probably vestibular migraine. If your vertigo came on suddenly and has been continuous for days, it is very likely vestibular neuritis. If your vertigo comes with hearing loss and tinnitus in one ear, Meniere's is at the top of the list. If your vertigo has been there quietly and constantly for months without a clear cause, PPPD is the leading candidate.

There are two situations that need urgent medical evaluation. The first is any vertigo accompanied by focal neurologic symptoms — sudden weakness, slurred speech, double vision, difficulty swallowing, severe imbalance out of proportion to the vertigo. The second is the first-ever severe vertigo attack of your life, particularly in a patient with vascular risk factors. Both need in-person evaluation to rule out stroke.

Once stroke is ruled out, the second question is which of the common peripheral causes is at play. That question is answered by a careful bedside vestibular exam — Dix-Hallpike, head impulse, gaze testing, positional testing. In experienced hands, this exam identifies the cause of the vertigo in the majority of patients without any imaging at all. Imaging is helpful for atypical cases, but it is not the first step.

This is the piece that trips up so many patients. Vertigo is common enough that most primary care physicians and emergency medicine physicians see it every week, but a full vestibular bedside exam is a subspecialty skill. When someone with vertigo is told 'the MRI is normal, you have vertigo, here is some meclizine,' the workup has essentially stopped at ruling out the rare bad thing without ever addressing the common thing.

Meclizine (brand name Antivert) is a vestibular suppressant. It buys temporary relief during the first few days of an acute vertigo episode, and that is its legitimate use. Long-term meclizine does not fix BPPV, does not fix vestibular migraine, does not fix Meniere's, and actively delays recovery from vestibular neuritis by suppressing the compensation process. If you have been on daily meclizine for weeks or months with no clear improvement, the medication is not the problem, but it is also not the answer.

Modern evidence-based vestibular care has shifted decisively toward mechanical repositioning maneuvers, structured rehab, and (where indicated) targeted medications, not indefinite vestibular suppressants.

Almost always, yes. Vestibular physical therapy is the primary evidence-based treatment for BPPV, vestibular neuritis, vestibular hypofunction, PPPD, and motion sensitivity in vestibular migraine. It is supported by APTA and Cochrane-level guidelines for every one of these diagnoses. What it cannot do is prescribe medication or perform surgery, both of which are occasionally warranted — but neither is the first-line answer for any of the top five causes.

The most important thing you can do if you have vertigo is get an accurate diagnosis. The specific mechanism matters, because each mechanism has a specific treatment. A patient with untreated BPPV does not benefit from a general balance class; they benefit from an Epley. A patient with vestibular migraine does not benefit from months of head-shaking exercises; they benefit from lifestyle stabilization, targeted rehab, and possibly a preventive.

If you are in Texas and you have been dealing with vertigo for more than a week or two, and no one has done a formal bedside vestibular exam, a virtual consultation with a vestibular specialist is a reasonable next step. The evaluation is thorough and unhurried, the exam translates well to secure video, and the plan you leave with will be built around what your specific type of vertigo actually needs.