Vertigo comes and goes because most conditions that cause it are episodic by nature. The inner ear’s balance system is surprisingly fragile, and small disruptions, whether from displaced crystals, fluid buildup, or inflammation, can send false motion signals to your brain that resolve once the disruption settles. The specific pattern of your episodes, how long they last and what sets them off, usually points to a particular cause.
The Most Common Cause: Loose Crystals
Benign paroxysmal positional vertigo, or BPPV, is the single most common form of vertigo. It happens when tiny calcium crystals called otoconia break loose from one part of the inner ear (the utricle) and drift into the semicircular canals. These canals are designed to detect head rotation by sensing fluid movement. When stray crystals tumble through the fluid, they mimic that movement and send a false signal to your brain that you’re spinning when you’re perfectly still.
This is why BPPV episodes are so short and so tied to position. Rolling over in bed, tilting your head back in the shower, or looking up at a high shelf shifts those crystals and triggers a burst of vertigo that typically lasts less than a minute. Once the crystals settle, the spinning stops. The on-off pattern can persist for days or weeks until the crystals either dissolve on their own or are guided back into place with a repositioning maneuver performed by a clinician.
Fluid Buildup in Ménière’s Disease
Ménière’s disease produces longer, more unpredictable episodes. The underlying problem is a buildup of fluid (endolymph) inside the inner ear that disrupts both hearing and balance signals traveling to the brain. Experts still don’t know exactly what causes the fluid to accumulate, but the result is episodes lasting anywhere from 20 minutes to 24 hours.
What distinguishes Ménière’s from other vertigo causes is the combination of symptoms that arrive together: spontaneous spinning vertigo, fluctuating hearing loss, a feeling of fullness or pressure in the ear, and tinnitus. The vertigo tends to come on without a clear positional trigger, unlike BPPV. Over time, hearing loss can become progressive and permanent, which is the most diagnostically recognizable feature of the disease. Episodes may cluster for weeks and then disappear for months, making the unpredictability itself one of the most stressful parts of living with it.
Vestibular Migraine
If you have a history of migraines, your vertigo episodes may be migraine-related even when you don’t have a headache. Vestibular migraine is one of the most common causes of episodic vertigo, and its hallmark is extreme variability. About 30% of people with vestibular migraine have episodes lasting minutes, 30% have attacks lasting hours, and another 30% experience symptoms that stretch over several days. A small percentage have bursts lasting only seconds, usually triggered by head motion or visual stimulation, that recur repeatedly over a longer period.
Position changes, head movements, and busy visual environments (scrolling screens, crowded stores) tend to trigger or worsen vestibular migraine episodes. The sensation itself can feel like spinning, floating, swaying, or general imbalance. A diagnosis typically requires at least five episodes of moderate to severe vestibular symptoms, each lasting between 5 minutes and 72 hours, in someone with a current or past migraine history. The core episode rarely exceeds 72 hours, though full recovery can sometimes take up to four weeks.
How It Differs From Ménière’s
The overlap between vestibular migraine and Ménière’s disease confuses a lot of people, including clinicians. The key differences: Ménière’s episodes tend to last a relatively fixed number of hours and come with progressive hearing loss, while vestibular migraine episodes vary wildly in length and any hearing changes are usually mild and reversible. Ménière’s vertigo tends to strike spontaneously. Vestibular migraine is more commonly provoked by movement or visual stimuli. And migraine features like light sensitivity, headache, or visual aura point toward vestibular migraine rather than Ménière’s.
Vestibular Neuritis: A One-Time Event That Lingers
Not all episodic vertigo follows a recurring pattern. Vestibular neuritis is an inflammation of the nerve connecting the inner ear to the brain, usually triggered by a viral infection. It typically causes a single, severe episode of vertigo that peaks over 24 to 72 hours and then gradually improves. Most people recover fully within a few weeks, though some have lingering symptoms that persist for months or occasionally years.
In about 95% of cases, vestibular neuritis is a one-time experience. The reason some people feel intermittent dizziness afterward comes down to how the brain recovers. After the nerve is damaged, the brain has to recalibrate its balance processing, a process called vestibular compensation. During this recovery, the brain gradually restores balanced signaling between the two sides of the vestibular system. Early on, it suppresses activity on the unaffected side to match the weakened side. Later, the damaged side’s nerve cells slowly regain sensitivity to head movement.
This compensation can be disrupted. Illness, fatigue, stress, or long periods of inactivity can temporarily set back the process, causing vertigo-like symptoms to resurface even after they seemed to have resolved.
Why Stress and Lifestyle Affect Episodes
Regardless of the underlying cause, certain lifestyle factors can make vertigo episodes more frequent or more intense. Chronic stress is one of the best-documented triggers. Stress hormones influence the vestibular system directly, and sustained high cortisol levels sensitize the nervous system, lowering the threshold for vertigo to kick in. Elevated blood pressure from chronic stress can also affect inner ear structures and disrupt normal vestibular function.
Sleep deprivation, high sodium intake, caffeine, and alcohol are commonly reported triggers, particularly for people with Ménière’s disease or vestibular migraine. The mechanism varies by condition. Sodium promotes fluid retention, which can worsen the endolymphatic fluid buildup in Ménière’s. Caffeine and poor sleep can lower the migraine threshold in vestibular migraine. For anyone with a vestibular condition, anxiety about the next episode can itself become a trigger, creating a feedback loop between emotional distress and physical symptoms.
Patterns That Help Identify the Cause
The timing and character of your episodes carry useful diagnostic information. Vertigo lasting under a minute and triggered by specific head positions points strongly toward BPPV. Episodes lasting 20 minutes to several hours with hearing changes suggest Ménière’s disease. Highly variable episode lengths in someone with a migraine history fit vestibular migraine. A single prolonged episode following a cold or upper respiratory infection is the classic pattern for vestibular neuritis.
Pay attention to what you’re doing when vertigo starts, how long the spinning lasts, and what other symptoms accompany it (hearing loss, headache, nausea, ear pressure). This information is the most valuable thing you can bring to a medical appointment.
When Vertigo Signals Something Serious
The vast majority of episodic vertigo comes from inner ear problems that, while disruptive, are not dangerous. But vertigo can occasionally signal a problem in the brain rather than the ear. Red flags that warrant urgent evaluation include new neurological symptoms alongside the vertigo: double vision, slurred speech, difficulty swallowing, facial weakness, severe coordination problems, or numbness on one side of the body. Strong risk factors for stroke, such as high blood pressure, diabetes, or atrial fibrillation, raise the concern further.
One useful distinction: inner ear (peripheral) vertigo tends to come with hearing changes or tinnitus and improves with stillness. Central vertigo, originating in the brain, more often produces nystagmus (involuntary eye movement) that doesn’t fade with time and neurological symptoms beyond just dizziness. If your vertigo episodes follow a consistent, predictable pattern with no additional neurological symptoms, a peripheral cause is far more likely.