Vertigo happens when your brain receives conflicting signals about where your body is in space, most often because something has gone wrong in your inner ear. About 7.4% of adults will experience true vestibular vertigo in their lifetime, and the causes range from harmless (loose crystals in your ear canal) to serious (reduced blood flow to the brain). Understanding what triggers your episodes is the first step toward making them stop.
How Your Balance System Works
Your inner ear contains a network of fluid-filled tubes called semicircular canals. These canals detect rotation in three dimensions. When you turn your head, fluid shifts inside the canals and bends tiny hair cells, which send electrical signals to your brain about which direction you’re moving. Your brain cross-references these signals with what your eyes see and what your muscles and joints feel. When all three inputs agree, you feel stable. When they don’t, you feel the spinning, tilting, or swaying sensation of vertigo.
Loose Crystals: The Most Common Cause
The single most common cause of vertigo is benign paroxysmal positional vertigo, or BPPV. Inside your inner ear, tiny calcium carbonate crystals called otoconia normally sit on a sensory organ called the utricle, where they help you detect gravity and linear movement. Sometimes these crystals break loose and drift into one of the semicircular canals, usually the one positioned lowest relative to gravity.
Once inside the canal, the crystals shift every time you move your head, dragging fluid along with them and stimulating the balance nerve. This is why BPPV causes brief but intense spinning when you roll over in bed, look up, or bend forward. Episodes typically last less than a minute but can be severe enough to cause nausea. The good news is that BPPV responds well to repositioning maneuvers, which guide the crystals back where they belong. A trained provider can often resolve it in a single office visit.
Vestibular Migraine
If you get migraines and also experience vertigo episodes, the two may be connected. Vestibular migraine causes moderate to severe dizziness lasting anywhere from 5 minutes to 72 hours. At least half the episodes occur alongside classic migraine features: one-sided headache, pulsating pain, sensitivity to light and sound, or visual disturbances like flashing lights.
What makes vestibular migraine tricky is that the vertigo can show up without a headache at all. Some people have spinning as their primary symptom and never connect it to migraine. If you have a personal or family history of migraines and your vertigo doesn’t follow positional patterns like BPPV, this is worth discussing with your doctor. Treatment usually involves the same lifestyle and medication strategies used for other types of migraine.
Inner Ear Infections and Inflammation
Two closely related conditions can cause vertigo that lasts days to weeks rather than seconds or minutes. Vestibular neuritis is inflammation of the nerve connecting your inner ear to your brain. It causes prolonged, sometimes constant vertigo but typically does not affect your hearing. Labyrinthitis is inflammation of the inner ear structures themselves, and it causes both vertigo and hearing loss, often with ringing in the affected ear.
Both conditions usually follow a viral illness. The worst of the vertigo often peaks in the first 24 to 48 hours, then gradually improves over days to weeks as your brain learns to compensate for the damaged signals. Anti-nausea and anti-dizziness medications can help during the acute phase, but they should only be used for the first one to three days. Using them longer can actually slow your brain’s natural recovery process by suppressing the signals it needs to recalibrate.
Ménière’s Disease
Ménière’s disease produces episodes of vertigo lasting 20 minutes to several hours, along with fluctuating hearing loss, ringing in one ear, and a feeling of fullness or pressure in that ear. The underlying problem is an abnormal buildup of fluid inside the inner ear’s membranous structures. The tube-like sac that normally reabsorbs this fluid shows structural problems that prevent it from draining properly, leading to swelling and pressure that disrupts both balance and hearing signals.
Ménière’s tends to come and go unpredictably. Some people have clusters of attacks followed by months of remission. Reducing sodium intake to under 2 grams per day is one of the most consistently recommended lifestyle changes, because excess salt increases fluid retention throughout the body, including the inner ear. Many people find that keeping a food diary and staying well hydrated helps them identify and avoid personal triggers.
Vertigo From Blood Flow Problems
Less commonly, vertigo originates not in the ear but in the brain, specifically in the areas supplied by the vertebral and basilar arteries running through the back of the neck. When blood flow through these vessels drops, a condition called vertebrobasilar insufficiency, the balance centers in the brainstem don’t get enough oxygen.
This type of vertigo is almost never the only symptom. It typically comes with some combination of double vision, slurred speech, difficulty swallowing, numbness, sudden weakness, confusion, or trouble with coordination. These are warning signs that the brain is being starved of blood, and they can precede a stroke. If your vertigo arrives with any of these neurological symptoms, it needs urgent medical evaluation.
How Doctors Tell the Difference
One of the most important distinctions in vertigo is whether the problem is peripheral (inner ear) or central (brain). Peripheral causes like BPPV, vestibular neuritis, and Ménière’s disease are far more common and generally less dangerous. Central causes like stroke or vertebrobasilar insufficiency are rarer but require immediate treatment.
In the emergency department, doctors use a bedside eye-movement exam called the HINTS test to distinguish between the two. It evaluates how your eyes track, whether they jerk in abnormal directions, and whether covering one eye changes what you see. Studies have found this three-part exam is roughly 96% sensitive and 94% specific for detecting central causes of acute vertigo, making it more accurate than even early brain imaging in some cases.
For you, the practical takeaway is this: vertigo that comes in brief positional bursts, responds to head movements, and has no other neurological symptoms is most likely an inner ear issue. Vertigo that is constant, came on suddenly, and is accompanied by new headache, vision changes, weakness, numbness, or trouble speaking needs immediate attention.
What Helps Vertigo Get Better
Treatment depends entirely on the cause, which is why getting the right diagnosis matters so much. BPPV responds to specific head-repositioning techniques. Vestibular migraine improves with migraine prevention strategies. Ménière’s disease is managed with dietary changes and sometimes medication to reduce fluid buildup. Vestibular neuritis and labyrinthitis mostly resolve on their own as the brain compensates.
Across nearly all types of vertigo, vestibular rehabilitation therapy, a form of physical therapy focused on balance retraining, speeds recovery. A therapist guides you through exercises that challenge your balance system in controlled ways, helping your brain recalibrate faster. This is especially important after vestibular neuritis or any prolonged episode that has left you feeling unsteady.
Over-the-counter antihistamines like meclizine can take the edge off acute symptoms, but they carry risks of drowsiness, balance problems, and memory issues with longer use. The general recommendation is to limit their use to the first few days of an episode. Your brain recovers faster when it’s forced to process the mismatched signals rather than having them chemically muted.