Vertigo, the sensation that you or the room around you is spinning, most often comes from a problem in the inner ear. The single most common cause is tiny calcium crystals dislodging inside your ear canal, a condition called BPPV that accounts for roughly half of all vertigo cases. But several other conditions can trigger it too, and the pattern of your symptoms is the biggest clue to what’s going on.
Before diving into causes, one distinction matters: vertigo is not the same as general dizziness. Feeling lightheaded, woozy, or like you might faint is different from feeling like the room is actually rotating. True vertigo involves that spinning or tilting sensation, and it points toward your vestibular system, the balance-sensing hardware in your inner ear and the nerves connecting it to your brain.
BPPV: The Most Common Cause
Benign paroxysmal positional vertigo, or BPPV, happens when tiny calcium crystals called otoconia break loose from their normal spot on a sensory organ in the inner ear. These crystals are supposed to stay put, helping you sense gravity and linear movement. When they detach, they drift into the semicircular canals, the fluid-filled loops that detect head rotation. The posterior canal is the most common landing spot because gravity naturally pulls the crystals there.
The crystals sit harmlessly until you move your head in certain ways. Rolling over in bed, looking up at a high shelf, bending down to tie your shoes, or tilting your head back in the shower can all set them in motion. When the crystals shift, they drag fluid through the canal, sending a false rotation signal to your brain. The result is a burst of intense spinning that typically lasts less than a minute but can be severe enough to cause nausea.
BPPV has a very recognizable pattern: short episodes triggered by specific head positions, with completely normal periods in between. If your vertigo hits when you lie down or turn over at night and stops within 30 to 60 seconds, BPPV is the most likely explanation. It can develop after a head injury, an ear infection, or simply with aging, though many people never identify a clear trigger. A clinician can confirm it with a positioning test that tips your head at specific angles and watches for characteristic involuntary eye movements.
The good news is that BPPV is highly treatable. A series of guided head movements, performed in a doctor’s office, can reposition the loose crystals back where they belong. Most people feel significant relief after one or two sessions.
Vestibular Neuritis and Labyrinthitis
If your vertigo came on suddenly, is severe, and has lasted hours or even days without letting up, the cause may be inflammation rather than loose crystals. Two conditions fall into this category, and they differ in one important way.
Vestibular neuritis affects the nerve that carries balance signals from the inner ear to the brain. It causes prolonged, intense vertigo but typically does not affect your hearing. Labyrinthitis involves inflammation of the inner ear structures themselves and causes both vertigo and noticeable hearing loss, sometimes with ringing in the ear. Both conditions usually follow a viral infection, even something as common as a cold or flu.
The vertigo from these conditions is constant rather than triggered by position changes. The worst of it usually peaks in the first day or two and then gradually improves over one to three weeks, though some people feel mildly off-balance for months afterward as the brain recalibrates. Vestibular rehabilitation exercises, which train the brain to compensate for the damaged signals, can speed recovery significantly.
Meniere’s Disease
Meniere’s disease produces a distinctive cluster of symptoms that sets it apart from other causes. The hallmark is recurring episodes of vertigo lasting anywhere from 20 minutes to 12 hours (sometimes up to 24 hours), paired with fluctuating hearing loss, ringing or buzzing in the affected ear, and a feeling of fullness or pressure, as if the ear is stuffed with cotton. You need at least two vertigo episodes plus confirmed hearing changes for a formal diagnosis.
The underlying problem is excess fluid buildup in the inner ear, though why this happens isn’t fully understood. Episodes can be unpredictable, and the hearing loss tends to worsen over time if the condition isn’t managed. Dietary changes are a common first step in management. Restricting salt, caffeine, and alcohol intake is widely recommended as a foundational strategy, since sodium in particular can influence fluid retention in the inner ear. Many people find that these adjustments reduce how often and how severely episodes hit.
Neck-Related Vertigo
Your cervical spine plays a key role in balance and coordination. When the neck is inflamed, arthritic, or injured, it can produce dizziness and unsteadiness that feels like vertigo. This is sometimes called cervicogenic dizziness, and it tends to accompany neck pain or stiffness, particularly after whiplash injuries or in people with significant neck arthritis.
There is no single test that confirms cervicogenic dizziness. Instead, doctors diagnose it by ruling out inner ear conditions first and then connecting your symptoms to a known neck problem. Physical therapy targeting neck mobility and strength is the primary treatment.
Other Triggers Worth Knowing
Several other factors can cause or contribute to vertigo. Migraines can produce vertigo even without a headache, a condition called vestibular migraine. If your spinning episodes come with sensitivity to light, motion sickness, or a history of migraines, this is worth exploring. Certain medications, particularly some blood pressure drugs, anti-seizure medications, and sedatives, can affect the vestibular system and cause vertigo as a side effect. Low blood pressure, dehydration, and anxiety disorders can also produce dizziness that overlaps with vertigo-like sensations.
When Vertigo Signals Something Serious
Most vertigo comes from the inner ear and, while miserable, is not dangerous. But in rare cases, vertigo signals a problem in the brain itself, such as a stroke affecting the areas that process balance. Certain warning signs point toward a central (brain-related) cause rather than an inner ear issue:
- Head or neck pain accompanying the vertigo
- Difficulty walking or coordinating movements (ataxia)
- Loss of consciousness
- Neurological changes like slurred speech, facial drooping, weakness on one side of the body, or double vision
- Severe, continuous symptoms lasting more than an hour without improvement
Any of these alongside vertigo warrants emergency evaluation. Strokes affecting the balance centers of the brain can mimic inner ear conditions closely, and emergency physicians use a specific bedside exam to tell the difference. The combination of how your eyes move, how your head responds to quick repositioning, and whether your eyes align vertically gives clinicians a reliable way to distinguish a stroke from an inner ear problem.
Figuring Out Your Pattern
The most useful thing you can do before seeing a doctor is pay attention to the details of your episodes. How long does the spinning last: seconds, minutes, or hours? Does it happen only with certain head movements, or is it constant? Do you have hearing changes, ear pressure, or ringing? Is there neck pain? Did it start after an illness?
These details narrow the diagnosis quickly. Seconds-long episodes triggered by rolling over in bed point strongly to BPPV. Hours-long attacks with hearing changes suggest Meniere’s. Days of constant vertigo after a cold suggest vestibular neuritis. Your doctor will likely ask exactly these questions, and having clear answers makes the diagnostic process faster and more accurate.