What Causes Vertigo? Types, Triggers and When to See a Doctor

Vertigo is not just feeling dizzy. It's the specific sensation that you or the room around you is spinning, tilting, or moving when nothing actually is. That distinction matters because it points directly to the inner ear or brain systems that control spatial orientation — and once you understand the cause, the management usually becomes straightforward.

About 40% of Americans experience dizziness at some point in their lives serious enough to see a doctor, and vertigo accounts for a significant share of that. Most cases are benign. Most resolve with relatively simple interventions. But some vertigo is a warning sign that requires urgent medical evaluation. Knowing the difference is what this guide is for.

Dizziness is a broad word that people use to describe several different sensations: lightheadedness, feeling faint, imbalance, and vertigo. They have different causes and different management pathways.

Vertigo specifically refers to a false sense of movement — usually spinning, but sometimes tilting or swaying. It originates in the vestibular system: either in the inner ear (peripheral vertigo, which accounts for roughly 80% of cases) or in the brainstem and cerebellum (central vertigo, which is less common but more serious).

Peripheral vertigo tends to come on suddenly, is often severe, and is typically made worse by head movement. It usually resolves with targeted treatment. Central vertigo tends to be more continuous, is associated with neurological symptoms like double vision or difficulty walking, and requires prompt medical evaluation.

Benign paroxysmal positional vertigo — BPPV — is the single most common cause of vertigo, accounting for approximately 17–42% of all vertigo diagnoses, according to the American Academy of Otolaryngology-Head and Neck Surgery's clinical practice guidelines (Bhattacharyya et al., 2017, 720 citations). It has a lifetime prevalence of 2.4% in the general population.

The cause is mechanical. Your inner ear contains tiny calcium carbonate crystals called otoconia (or "ear rocks") embedded in a gel-like structure called the utricle. They help you sense linear acceleration and gravity. When these crystals break loose — from head trauma, vigorous movement, aging, or sometimes no identifiable cause — they can migrate into one of the three fluid-filled semicircular canals that sense rotational movement.

Once the crystals are in the canal, any head movement that shifts them triggers an abnormal fluid surge, sending a false rotation signal to the brain. The result is a brief but intense spinning sensation — typically lasting under a minute — triggered by specific head positions like rolling over in bed, looking up, or bending forward.

The good news: BPPV is highly treatable. The canalith repositioning procedure (most commonly the Epley maneuver) guides the displaced crystals back out of the canal using a series of head position changes. The AAO-HNS clinical guidelines make a strong recommendation for the Epley maneuver as first-line treatment, and make a specific recommendation against routinely using antihistamines or benzodiazepines for BPPV, since vestibular suppressant medications slow recovery without fixing the mechanical problem.

A 2023 randomized clinical trial by Strupp et al. published in JAMA Neurology (25 citations) compared the Semont-plus maneuver against the Epley maneuver in 195 patients with posterior canal BPPV. The Semont-plus group reached full recovery in a median of 1 day versus 2 days for the Epley group (p=0.01). Both maneuvers were safe. The takeaway: repositioning maneuvers work fast and the evidence for them is very strong.

Yes — and this is more relevant than most people realize. BPPV recurrence is common (recurrence rates of 15–50% have been documented), and vitamin D deficiency is one of the most consistently identified risk factors for it. The proposed mechanism: the otoconia crystals are made of calcium carbonate, and vitamin D plays a direct role in calcium metabolism and the integrity of the utricular membrane that holds the crystals in place.

A 2020 multicenter randomized controlled trial by Jeong et al. published in Neurology (62 citations) followed 957 patients with confirmed BPPV after successful treatment with canalith repositioning maneuvers. Half received vitamin D 400 IU plus calcium 500 mg twice daily for one year when their serum vitamin D was below 20 ng/mL. The result: the intervention group had a significantly lower annual recurrence rate — 0.83 recurrences per person-year versus 1.10 in the observation group (incidence rate ratio 0.76, p<0.001). The number needed to treat was 3.7. A 2024 double-blind RCT by Chua et al. in Otolaryngology — Head and Neck Surgery found an 87% reduction in recurrence rates in the vitamin D-treated group versus placebo.

So if you have recurrent BPPV, getting your vitamin D level tested and correcting deficiency is one of the most evidence-based things you can do to reduce how often it comes back. Inner ear support supplements that include vitamin D, and in some formulas calcium, are specifically grounded in this research.

These two conditions are often confused and are closely related. Both involve inflammation of the vestibular nerve or inner ear, usually following a viral infection — often a respiratory illness that the person has already recovered from.

Vestibular neuritis affects the vestibular nerve without involving the cochlea (the hearing part of the inner ear). The hallmark presentation is a sudden onset of severe, constant vertigo that lasts hours to days, gradually improving over several weeks. There's no hearing loss because the cochlea is unaffected.

Labyrinthitis involves inflammation of the entire labyrinth, including the cochlea. The vertigo is similar but is accompanied by hearing loss or tinnitus.

Both conditions are self-limiting — the inflammation resolves on its own, and the brain compensates over time through a process called vestibular compensation. The main treatment approach is vestibular rehabilitation exercises that accelerate this compensation process. Short-term use of vestibular suppressants can reduce acute nausea and dizziness but should be tapered quickly because they actually slow down vestibular compensation and extend recovery time if used long-term.

Meniere's disease is a chronic inner ear disorder caused by abnormal fluid pressure in the endolymph — the fluid inside the membranous labyrinth. The defining feature is the triad: episodic vertigo (lasting 20 minutes to several hours), fluctuating hearing loss in the affected ear, and tinnitus or a feeling of fullness in the ear.

Attacks often come in clusters, with periods of remission between them. Over time, hearing loss can become permanent. The cause isn't fully understood, but disruptions in endolymphatic fluid production, absorption, or both appear to be central to the pathology.

Dietary management is a cornerstone of Meniere's disease: reducing sodium intake (to reduce fluid retention), limiting caffeine and alcohol (which affect inner ear fluid dynamics), and staying well hydrated. These interventions reduce attack frequency meaningfully for many patients. Medical management includes diuretics to reduce fluid pressure, and in severe cases, intratympanic steroid injections or gentamicin treatment.

Vestibular migraine is significantly underdiagnosed. Migraine can cause vertigo without headache, or with only a mild headache, making it frequently mistaken for other vestibular conditions. Vertigo episodes in vestibular migraine can last minutes to hours. Management follows standard migraine prevention strategies.

Can sinuses cause vertigo? Yes, though the mechanism is indirect. Sinus congestion or chronic sinusitis can affect eustachian tube function, which influences middle ear pressure. Abnormal middle ear pressure can create a sensation of fullness and imbalance that feels like mild vertigo. This is not the same as true vestibular vertigo and typically resolves when the underlying sinus condition is treated.

Can anxiety cause vertigo? Yes. Hyperventilation associated with anxiety alters carbon dioxide levels in the blood, which affects cerebral blood flow and can cause lightheadedness and a sense of spatial disorientation that some people describe as vertigo. Chronic anxiety also increases sensitivity to vestibular signals. There is a bidirectional relationship between vestibular disorders and anxiety — having unexplained dizziness causes anxiety, and anxiety exacerbates vestibular symptoms.

Can dehydration cause dizziness? Yes. Dehydration reduces blood volume, which lowers blood pressure and reduces cerebral blood flow. This causes lightheadedness and presyncope that can be mistaken for vertigo. True spinning vertigo from dehydration alone is uncommon, but the overlap is worth knowing.

Can stress cause vertigo? Yes, through two mechanisms: the anxiety-hyperventilation pathway described above, and through cortisol's effects on inner ear fluid balance. Elevated cortisol is thought to affect endolymph regulation, which is why stress is a known Meniere's trigger.

Medication-induced vertigo is more common than most patients realize. Aminoglycoside antibiotics are well-known vestibulotoxins. Loop diuretics, certain blood pressure medications, high-dose aspirin, and quinine can all cause vestibular side effects. If you've started a new medication and developed vertigo, that's worth discussing with your prescriber.

Cervicogenic dizziness originates from the neck — specifically from proprioceptive signals from cervical joints and muscles that are disrupted by injury, arthritis, or poor posture. It typically causes a sensation of imbalance rather than true spinning vertigo, and is often associated with neck pain or stiffness.

Head position changes — lying down, rolling over in bed, looking up at a shelf — are the classic triggers for BPPV. The crystals move when the canal changes orientation relative to gravity. Avoiding these movements delays compensation; the proper response is to move through them using repositioning maneuvers.

Sleep deprivation and stress both worsen vestibular symptoms, partly through cortisol dysregulation and partly through increased sensitivity to motion signals.

Bright screens, visual motion (driving past trees, scrolling), and environments with busy visual patterns overwhelm the visual-vestibular integration system in people with ongoing vestibular dysfunction — a condition called visual vertigo.

High sodium, caffeine, and alcohol intake are specific triggers for Meniere's disease by affecting endolymph fluid pressure.

If a doctor has confirmed BPPV (or if you have the classic presentation of brief positional spinning triggered by lying down or rolling over), the Epley maneuver can be performed at home after proper instruction. It involves moving through a sequence of four head positions over about 15 minutes, guiding the displaced crystals out of the semicircular canal. Success rates are 70–90% for posterior canal BPPV (the most common type) in a single session.

A 2023 randomized trial by Kim et al. in JAMA Neurology demonstrated that a web-based system for diagnosing and self-treating recurrent BPPV achieved 72.4% vertigo resolution in the treatment group versus 42.9% in controls — confirming that self-performed repositioning maneuvers are highly effective when used correctly.

For vestibular neuritis, labyrinthitis, or chronic vestibular dysfunction, vestibular rehabilitation exercises — a structured program of balance and gaze stability exercises prescribed by a physiotherapist — accelerate central compensation and substantially reduce symptoms. This is the evidence-based standard of care, not medication.

Vitamin D is the most evidence-supported supplement for vertigo — specifically for reducing BPPV recurrence in people who are deficient. The Jeong et al. 2020 RCT is the landmark evidence. Get your level tested; if below 20 ng/mL, supplementation is both reasonable and supported by clinical data.

For general vestibular and inner ear support, the research on supplements like ginkgo biloba (which improves inner ear blood flow) and vitamin B12 (deficiency is associated with vertigo in some presentations) is less robust but worth discussing with your provider.

Antihistamines like meclizine, dimenhydrinate (Dramamine), and diphenhydramine (Benadryl) reduce the intensity of vertigo and nausea in the short term by suppressing vestibular activity. For acute severe episodes — when the room is spinning and you need to function — they're a reasonable short-term measure.

They are NOT appropriate as ongoing treatment for BPPV or for most vestibular conditions because they interfere with vestibular compensation. The AAO-HNS guideline makes this explicit: routine treatment of BPPV with vestibular suppressant medications is specifically recommended against.

Most vertigo is peripheral and benign. But some combinations of symptoms indicate central vertigo from stroke, cerebellar hemorrhage, or other serious neurological causes. Seek emergency care immediately if vertigo comes with any of these:

Sudden severe headache — particularly the worst headache of your life, which may indicate subarachnoid hemorrhage. Double vision or other sudden visual changes. Numbness or weakness in the face, arm, or leg. Difficulty speaking or swallowing. Inability to walk straight even when not actively dizzy. Sudden hearing loss in both ears.

Emergency physicians use a test called the HINTS exam (Head Impulse, Nystagmus, Test of Skew) to differentiate peripheral from central vertigo at the bedside — it's more sensitive than early MRI for posterior stroke.