Vertigo attacks happen when your brain receives conflicting signals about your body’s position and movement, almost always because something has gone wrong in the inner ear or, less commonly, in the brain itself. Roughly one in five adults will experience vertigo at some point, and about 8% deal with episodes bothersome enough to interfere with daily life. The cause determines everything from how long an attack lasts to how it’s treated, and several distinct conditions can be responsible.
Loose Crystals in the Inner Ear (BPPV)
Benign paroxysmal positional vertigo, or BPPV, is the single most common cause of vertigo attacks. It accounts for about 40% of cases seen in emergency settings. Inside each ear, tiny calcium crystals sit on a sensory organ called the utricle, where they help detect gravity and linear movement. Sometimes these crystals break free and drift into the semicircular canals, the fluid-filled tubes that sense head rotation. Once loose, the crystals settle at the lowest point of the canal and cause the fluid to shift every time you move your head, sending false rotation signals to the brain.
The hallmark of BPPV is brief, intense spinning triggered by specific head movements: rolling over in bed, tilting your head back to look up, or bending forward. Each episode typically lasts only seconds, which is one of the clearest ways to distinguish it from other causes. The crystals can dislodge after a head injury, due to aging, or for no identifiable reason at all.
BPPV responds well to repositioning maneuvers that guide the crystals out of the canal, but recurrence is common. Studies report that 14% to 48% of people have another episode within a year of successful treatment, and the majority of recurrences happen in that first year.
Fluid Buildup in the Inner Ear (Meniere’s Disease)
Meniere’s disease produces vertigo attacks that are longer and more disabling than BPPV, typically lasting anywhere from 20 minutes to 12 hours. The underlying problem is an abnormal accumulation of fluid in the inner ear’s endolymphatic system. This isn’t a simple pressure buildup the way a clogged pipe backs up. The membranes separating the inner ear’s fluid compartments are extremely flexible, so the fluid volume can increase with almost no measurable pressure change. Instead, the attacks likely happen when those overstretched boundary membranes rupture, mixing fluids that should remain separate and short-circuiting the signals your ear sends to your brain.
Meniere’s attacks come with a recognizable cluster of symptoms: vertigo, fluctuating hearing loss (usually in one ear), a sensation of fullness or pressure in the ear, and tinnitus (ringing or roaring). The episodes are unpredictable and can vary in frequency from several times a week to months apart. Over time, hearing loss can become permanent.
Inner Ear Infections and Inflammation
Two closely related conditions, vestibular neuritis and labyrinthitis, cause vertigo through inflammation rather than mechanical problems. Vestibular neuritis affects the nerve connecting the inner ear to the brain, producing prolonged, severe vertigo that can last days but typically does not cause hearing loss. Labyrinthitis involves inflammation of the inner ear structures themselves and causes both prolonged vertigo and hearing loss.
Both conditions usually follow a viral infection. The vertigo tends to be constant rather than coming in short attacks, peaking in the first 24 to 48 hours and then gradually improving over days to weeks. Some people are left with lingering imbalance or dizziness for months as the brain recalibrates to the damaged input from one ear.
Vestibular Migraine
Migraine doesn’t just cause headaches. Vestibular migraine is now recognized as a distinct condition in which the brain’s migraine circuitry produces moderate to severe vertigo episodes lasting anywhere from five minutes to 72 hours. At least half of episodes occur alongside classic migraine features: one-sided or pulsating headache, sensitivity to light and sound, or visual aura. But some attacks involve vertigo alone, with no headache at all, which makes the condition easy to miss.
A formal diagnosis requires at least five episodes with vestibular symptoms plus a current or past history of migraine. Vestibular migraine is one of the most common causes of recurrent vertigo and is thought to be significantly underdiagnosed, partly because many people and clinicians don’t associate dizziness with migraine. Common triggers mirror those of typical migraine: stress, poor sleep, certain foods, hormonal changes, and sensory overload.
Neck-Related Vertigo
Your neck muscles, particularly the small muscles at the base of the skull, are packed with sensory receptors that constantly tell your brain where your head is positioned relative to your body. When something disrupts these signals, your brain receives conflicting information from the neck, the eyes, and the inner ears, and the result can be dizziness or vertigo.
This sensory mismatch can occur with whiplash injuries, chronic neck pain, cervical arthritis, or myofascial pain in the neck muscles. Even small changes in the movement of the upper cervical joints can cause major shifts in the firing rate of the nerve receptors in surrounding muscles. The dizziness is often described as unsteadiness rather than true spinning and tends to worsen with sustained neck positions or head movements. It frequently coexists with neck pain and stiffness, which can help point to the neck as the source.
Medications That Damage the Inner Ear
More than 200 medications can potentially damage the inner ear, a side effect known as ototoxicity. The drug classes most commonly responsible include certain antibiotics used for serious bacterial infections (aminoglycosides like gentamicin and tobramycin), platinum-based chemotherapy drugs, and loop diuretics prescribed for fluid retention or heart failure. Even high doses of aspirin can cause temporary vestibular symptoms.
Medication-related vertigo usually develops gradually rather than in sudden attacks, and it often affects both ears, which can make balance particularly difficult. If you notice new dizziness, unsteadiness, or changes in hearing while taking any medication, that connection is worth raising with your prescriber, since catching ototoxicity early can sometimes prevent permanent damage.
Stroke and Other Brain-Based Causes
In a small but important percentage of cases, vertigo originates in the brain rather than the inner ear. Strokes or reduced blood flow affecting the brainstem or cerebellum can produce sudden vertigo that closely mimics an inner ear problem. In one study of 300 emergency patients presenting with acute vertigo, about 20% had a central cause on brain imaging, and nearly 80% of those were strokes.
Central vertigo tends to differ from inner ear vertigo in a few ways. It’s often accompanied by other neurological symptoms: difficulty walking, double vision, slurred speech, numbness on one side of the body, or severe coordination problems. The vertigo may be less intense than BPPV but more persistent and harder to suppress. Emergency physicians use specialized bedside eye-movement tests that are highly sensitive (over 95%) at distinguishing strokes from inner ear problems, often outperforming early brain scans.
How Attack Duration Points to the Cause
One of the most useful clues in sorting out vertigo is simply how long each episode lasts. Vertigo measured in seconds that’s triggered by head position changes points strongly to BPPV. Episodes lasting minutes to hours suggest Meniere’s disease or vestibular migraine. Constant vertigo lasting days is more typical of vestibular neuritis or labyrinthitis. And vertigo with any accompanying neurological symptoms, regardless of duration, raises concern for a brain-based cause.
Tracking the pattern of your episodes, including how long they last, what triggers them, and what other symptoms accompany them, gives a clinician most of what they need to narrow down the cause and start appropriate treatment.