Vertigo is a false sensation of movement, usually spinning, when you’re actually standing or sitting still. It’s not the same as general dizziness or lightheadedness. With vertigo, you or the room around you feels like it’s rotating, tilting, or swaying. About 1 in 5 adults will experience it at some point, with prevalence peaking between ages 55 and 64. The causes range from harmless to serious, but most cases originate in the inner ear and resolve with treatment.
How Your Balance System Works
Your inner ear contains a set of small, fluid-filled structures that detect motion. These include three semicircular canals, which sense rotation, and two organs called the utricle and saccule, which detect gravity and straight-line movement. When you turn your head, the fluid inside these structures shifts and pushes against tiny hair cells. Those hair cells convert the motion into electrical signals that travel along a nerve to your brainstem, which uses that information, along with input from your eyes and muscles, to keep you balanced.
Vertigo happens when something disrupts this system. If the signals from one ear don’t match the signals from the other, or don’t match what your eyes are seeing, your brain interprets the conflict as motion that isn’t really happening. The result is that unmistakable spinning sensation, often accompanied by nausea, vomiting, or difficulty focusing your eyes.
The Most Common Cause: Loose Crystals
The single most common cause of vertigo is a condition called benign paroxysmal positional vertigo, or BPPV. Inside your utricle, tiny calcium crystals called otoconia help you sense gravity. Sometimes these crystals break free and drift into one of the semicircular canals, usually the posterior canal since it sits at the lowest point relative to gravity. Once lodged there, the crystals disturb the normal flow of fluid every time you change head position, sending a false motion signal to your brain.
BPPV episodes are brief but intense. The spinning typically lasts less than a minute and is triggered by specific movements: rolling over in bed, tilting your head back, or bending forward. Between episodes you may feel fine, which is a key distinguishing feature. The crystals can dislodge for no clear reason, though head injuries, aging, and prolonged bed rest are known contributors.
The good news is that BPPV is highly treatable. A simple head-repositioning technique called the Epley maneuver guides the loose crystals out of the semicircular canal and back to where they belong. In clinical studies, about 72% of patients recovered immediately after the maneuver, and 92% were symptom-free within a week. A doctor or physical therapist can perform it in their office, and some people learn to do a version at home.
Inner Ear Infections and Inflammation
Viral infections can inflame the structures of your inner ear and trigger vertigo that lasts days or even weeks, far longer than BPPV. Two closely related conditions fall into this category. Vestibular neuritis affects the nerve connecting the inner ear to the brain, causing prolonged vertigo without significant hearing loss. Labyrinthitis involves inflammation of the inner ear itself and typically causes both vertigo and hearing changes, such as muffled sound or ringing in the affected ear.
Both conditions usually follow a respiratory or viral illness. The vertigo tends to be most severe in the first few days, then gradually improves as the brain learns to compensate for the damaged signals. Full recovery can take several weeks, and some people benefit from vestibular rehabilitation exercises that retrain the brain’s balance processing.
Ménière’s Disease
Ménière’s disease is a chronic inner ear condition caused by a buildup of fluid (called endolymph) in the structures responsible for both balance and hearing. That excess fluid distorts the signals traveling to your brain, producing episodes of vertigo that last anywhere from 20 minutes to 12 hours.
What sets Ménière’s apart is its combination of symptoms. Along with the spinning, you typically experience fluctuating hearing loss (especially for lower-pitched sounds), ringing or roaring in one ear, and a sensation of fullness or pressure in the affected ear. A formal diagnosis requires at least two spontaneous vertigo episodes plus documented hearing changes. The condition tends to come and go unpredictably. Some people have clusters of attacks followed by months of remission.
Central Causes: Brain-Related Vertigo
Most vertigo starts in the inner ear, but a smaller percentage originates in the brain itself. This is called central vertigo, and it occurs when something disrupts the brainstem or cerebellum, the areas that process balance signals. Common causes include stroke, multiple sclerosis, brain tumors, and vestibular migraine.
Vestibular migraine is the most frequent central cause, affecting an estimated 1% to 3% of the general population. It produces episodes of vertigo that may or may not come with a headache. Some people experience spinning during the migraine, while others notice it before or after the head pain. In older adults with risk factors like high blood pressure or diabetes, central vertigo is more likely related to reduced blood flow to the brainstem or cerebellum. In younger adults, inflammatory conditions like multiple sclerosis are a more typical cause.
Central vertigo is generally more concerning than peripheral (inner ear) vertigo because it can signal a stroke or other serious neurological problem. Warning signs that vertigo may have a central origin include difficulty walking or coordinating movements, double vision, slurred speech, severe headache, numbness or weakness on one side of the body, and eye movements that change direction when you look in different directions. Any combination of these symptoms with new vertigo warrants immediate medical evaluation.
Medications and Other Triggers
A surprisingly long list of medications can cause vertigo or dizziness as a side effect. The most commonly implicated drug classes include blood pressure medications, antidepressants (particularly SSRIs), anti-seizure drugs, certain antibiotics, sedatives, and some anti-inflammatory painkillers. Environmental toxins like lead and mercury can also damage the inner ear and produce vertigo. If your vertigo started shortly after beginning a new medication, that connection is worth raising with your prescriber.
Beyond medications, certain situations trigger vertigo even in healthy people. Motion sickness from cars, boats, or planes is essentially a form of vertigo caused by conflicting signals between your eyes and inner ear. Heights can produce a similar mismatch. Anxiety disorders, panic attacks, and hyperventilation are also recognized triggers, sometimes called psychogenic vertigo, where the balance system is physically intact but the brain’s processing of its signals goes awry.
How Vertigo Gets Diagnosed
Diagnosing vertigo starts with your description of the symptoms. The pattern matters enormously: how long each episode lasts, what triggers it, and whether you have hearing changes or neurological symptoms. These details often point toward a specific cause before any testing begins.
For suspected BPPV, doctors use a bedside test called the Dix-Hallpike maneuver. You sit on an exam table while the clinician turns your head 45 degrees to one side, then quickly lays you back so your head hangs slightly below the table’s edge. If loose crystals are present in the posterior canal, the position will trigger a burst of vertigo and visible involuntary eye movements called nystagmus within a few seconds. The test’s sensitivity for posterior canal BPPV ranges from 48% to 88%, so a negative result doesn’t always rule it out, especially if the crystals are in a different canal.
When a central cause is suspected, clinicians may use a three-part bedside exam that checks for specific eye movement patterns and eye alignment. Imaging with an MRI is typically reserved for cases where stroke, tumor, or multiple sclerosis is a possibility.
What Recovery Looks Like
Recovery depends entirely on the cause. BPPV often resolves in a single office visit with repositioning maneuvers, though it can recur. Vestibular neuritis and labyrinthitis usually improve over weeks as the brain adapts, and vestibular rehabilitation exercises can speed that process. Ménière’s disease is managed long-term with dietary changes (particularly reducing salt intake to limit fluid retention), and some people see significant improvement. Vestibular migraine responds to many of the same strategies used for migraines in general, including identifying personal triggers and preventive approaches.
For most people, vertigo is temporary and treatable. Even when the underlying cause can’t be fully eliminated, the brain has a remarkable ability to recalibrate its balance processing over time, a process called vestibular compensation. Staying active and moving through mild dizziness, rather than avoiding movement entirely, generally helps this adaptation happen faster.