Vertigo, the false sensation that you or your surroundings are spinning, stems from a problem somewhere in the balance system that connects your inner ear to your brain. The cause is usually benign and treatable, but in rare cases vertigo signals something more serious like a stroke. Understanding where the problem originates helps explain why you feel the way you do and what to expect from treatment.
BPPV: The Most Common Cause
Benign paroxysmal positional vertigo, or BPPV, is by far the most frequent cause of vertigo. Inside your inner ear, tiny calcium crystals help detect gravity. For various reasons, these crystals can dislodge and drift into the semicircular canals, the fluid-filled tubes your body uses to sense rotation. Once there, the loose crystals make those canals hypersensitive to certain head positions, sending false spinning signals to your brain.
BPPV episodes are brief, usually lasting less than a minute, and are triggered by specific movements: tipping your head up or down, lying down, rolling over in bed, or sitting up. The vertigo can be intense but tends to fade quickly once you hold still. It often resolves on its own over weeks, and a simple in-office repositioning maneuver can move the crystals back where they belong. The gold-standard diagnostic test, called the Dix-Hallpike maneuver, involves your provider guiding you through head movements while watching for involuntary eye twitching, which confirms the crystals are out of place.
Ménière’s Disease
Ménière’s disease causes episodes of vertigo that are longer and more disabling than BPPV, often lasting 20 minutes to several hours. The underlying problem is excess fluid pressure in the inner ear’s hydraulic system. Your inner ear contains two types of fluid that help with both hearing and balance. When pressure builds in one of them (endolymph), it disrupts both systems at once.
This is why Ménière’s produces a distinctive cluster of four symptoms: spinning vertigo (sometimes violent), fluctuating hearing loss, low-pitched ringing or roaring in the ear, and a feeling of fullness or pressure in the affected ear. Episodes come and go unpredictably. Over time, hearing loss can become permanent. The condition typically affects one ear, though it can eventually involve both.
Vestibular Neuritis and Labyrinthitis
These two conditions are closely related and usually follow a viral infection. Both cause prolonged vertigo that can last days to weeks, unlike the brief episodes of BPPV. The key difference between them is hearing.
Vestibular neuritis inflames the nerve connecting your inner ear to your brain, causing severe vertigo without significant hearing loss. Labyrinthitis inflames the inner ear structure itself (the labyrinth), which handles both balance and hearing, so it causes vertigo plus hearing loss. In both cases, the vertigo is constant rather than triggered by head position, and it gradually improves as the inflammation resolves and the brain learns to compensate.
Vestibular Migraine
Migraine doesn’t just cause headaches. It can also produce moderate to severe vertigo episodes lasting anywhere from five minutes to 72 hours. Vestibular migraine is diagnosed when you have a history of migraine and experience at least five vertigo episodes, with at least half accompanied by migraine features: one-sided pulsating headache, sensitivity to light and sound, or visual aura.
What makes vestibular migraine tricky is that the vertigo and the headache don’t always show up together. Some people experience spinning without any head pain at all during a given episode, which can delay diagnosis. Treatment generally follows the same strategies used for other types of migraine, including lifestyle modifications and preventive medications.
Neck-Related Vertigo
Your cervical spine plays a direct role in balance and coordination. When the neck is inflamed, arthritic, or injured, it can produce dizziness and unsteadiness sometimes called cervicogenic vertigo. This is more common after whiplash injuries, cervical disc problems, or in people with significant neck arthritis.
Treatment often involves vestibular rehabilitation, a set of exercises that retrain your balance system to adapt to changes in your neck. These exercises also help coordinate your eye and head movements, reducing the uncontrolled eye motion that contributes to feeling unsteady.
Medications That Damage the Inner Ear
More than 200 medications are considered potentially ototoxic, meaning they can damage the inner ear and cause vertigo, hearing loss, or both. The most well-known culprits fall into a few categories:
- Certain antibiotics used for serious bacterial infections, particularly a class called aminoglycosides
- Platinum-based chemotherapy drugs used to treat various cancers
- Loop diuretics (water pills) prescribed for fluid retention and heart failure
- Antimalarial drugs containing quinine
- High-dose aspirin, which belongs to a group called salicylates
The risk depends on the dose, duration, and your individual susceptibility. In some cases the damage is reversible once the medication is stopped. In others, particularly with certain antibiotics and chemotherapy drugs, the damage can be permanent. If you develop vertigo or notice changes in your hearing while taking any medication, that’s worth bringing up with your prescriber promptly.
Stroke and Other Serious Causes
In rare cases, vertigo is the primary symptom of a stroke affecting the back of the brain (the posterior circulation, which supplies the balance centers). This is one of the most important causes to recognize because it requires emergency treatment. Alarmingly, fewer than 20% of stroke patients who present with vertigo have obvious neurological signs like facial drooping or limb weakness. Some score a zero on standard stroke screening scales, making them easy to miss.
Strokes affecting the artery that supplies the inner ear can even mimic Ménière’s disease, producing vertigo with hearing symptoms and eye movements that look identical to a peripheral ear problem. A specialized bedside eye exam called HINTS (testing head impulse response, nystagmus type, and eye alignment) has been shown to rule out stroke more accurately than early MRI in patients with acute, continuous vertigo.
Warning signs that vertigo may have a central (brain) cause include vertigo that is continuous rather than positional, severe imbalance where you can’t walk without support, double vision, slurred speech, difficulty swallowing, numbness or weakness on one side, and a new, severe headache. Any combination of these with vertigo warrants emergency evaluation.
How Doctors Identify the Cause
The pattern of your vertigo tells your doctor a lot. Brief episodes triggered by head movement point toward BPPV. Hours-long attacks with hearing changes suggest Ménière’s disease. Days of constant vertigo after a cold suggest vestibular neuritis. Vertigo with migraine features points to vestibular migraine.
The physical exam is often more revealing than imaging. For suspected BPPV, the Dix-Hallpike maneuver has been the gold standard since 1952. Your provider moves your head into specific positions and watches your eyes for involuntary twitching. If that test is negative, a supine head roll test can check for less common forms of BPPV. For acute, continuous vertigo, the HINTS exam helps distinguish inner ear problems from stroke with remarkable accuracy. Imaging with MRI is typically reserved for cases where a central cause is suspected or the diagnosis remains unclear after the bedside evaluation.