BPPV: the crystals are back in place, so why does the room still sway?

Up to six in ten people feel dizzy for weeks after a successful repositioning manoeuvre. Pre-treatment anxiety predicts who.

This page is about understanding the condition and the role the brain and nervous system can play in it. It is not a diagnosis. Your own clinicians know your case.

What benign paroxysmal positional vertigo is

Deep in the inner ear, tiny calcium carbonate crystals sit on a gel membrane and help sense gravity. In BPPV some of these crystals break free and drift into one of the three fluid-filled semicircular canals that sense rotation. Now, when the head moves into certain positions, the crystals tumble through the fluid and send a false signal of spinning. The result is sudden, intense vertigo lasting seconds to a minute, triggered by lying down, rolling over, tipping the head back or bending forward, often with nausea.

The diagnosis is made in the clinic with a positional test (the Dix-Hallpike) that provokes the vertigo and a characteristic eye movement. Treatment is a repositioning manoeuvre, such as the Epley, in which the clinician moves the head through a sequence of positions to steer the crystals out of the canal. Success rates are high, often after a single session.

The neuroplastic contribution

Neuroplastic symptoms are real symptoms produced by learned pathways in the brain and nervous system, a sensitized alarm system, rather than by ongoing damage or disease. They are not imaginary and not 'all in your head', and because the brain can change, they are reversible.

The ATNS Index of Neuroplastic Symptoms is clear that BPPV is not due to neuroplastic symptoms. The crystals are really loose and the manoeuvre really fixes them. But the index adds that if the symptoms or the course over time are not typical, or if the response to treatment is unsatisfactory, an assessment for neuroplastic symptoms can be helpful.

The typical course is: brief positional spinning, successful manoeuvre, done. The atypical course, which turns out to be common, is: successful manoeuvre, positional test now negative, and yet a lingering sense of unsteadiness, floating, lightheadedness or fog that lasts weeks or months. Clinicians call this residual dizziness.

Why would the brain do that? BPPV attacks are sudden and unpredictable, and the first one often feels like a stroke. The nervous system learns that head movement is dangerous. People start moving stiffly, avoid lying flat, and scan constantly for the next attack. That vigilance itself produces dizziness. When it persists for three months or more, it can meet criteria for persistent postural-perceptual dizziness, which commonly follows BPPV. Chronic dizziness of this kind is a textbook neuroplastic symptom.

What the research shows

A review of residual dizziness after successful repositioning for BPPV reports that it affects roughly 30 to 61 percent of patients, lasting from a few weeks to several months, and discusses competing explanations, including continuing inner-ear dysfunction and the anxiety produced by the unpredictability of the attacks themselves.

A 2023 study of 40 older adults with BPPV measured cognition, anxiety and depression before treatment and then tracked residual dizziness. Anxiety before treatment was the only significant predictor of residual dizziness in the multivariate model, which the authors described as possibly the strongest predictor in this group.

A 2012 clinical study found that adding an anti-anxiety medication after a successful repositioning manoeuvre reduced residual dizziness, which the authors took as support for an anxiety-related mechanism. These are small, mostly observational studies, so they show association rather than cause, and some residual dizziness may reflect the ear still recalibrating. But the consistent link with anxiety supports the index's advice to assess the nervous system when BPPV does not resolve as expected.

Signs the brain may be part of the picture

• Your positional test is now negative but you still feel unsteady, floaty or foggy.
• The sensation is constant rather than triggered by specific head positions.
• Busy visual environments, screens or crowds make it worse.
• You avoid lying flat, rolling over, bending down or turning your head quickly.
• You felt anxious or panicky during the attacks, or were already anxious beforehand.
• It is worse when tired or stressed and better when absorbed in something.

Avoidance keeps the balance system from settling, as described in our guide to the fear-avoidance cycle.

A solution that addresses it

There is an approach that addresses the brain's contribution to residual dizziness: symptom reprocessing. It combines education about neuroplastic symptoms, somatic tracking (observing the sway with curiosity rather than alarm), reducing fear and the sense of threat, a graded return to head movement, lying flat and busy environments, emotional awareness and expression, and acceptance and commitment skills. It pairs well with vestibular rehabilitation exercises. Trained clinicians deliver it, and digital programs increasingly make it available at home.

Cindra is a daily AI companion built around these approaches, with daily check-ins, short practices and plain-language lessons for people whose symptoms have a neuroplastic component. You can join the waitlist.

What to do next

Get the diagnosis confirmed and the manoeuvre done by someone trained in it; it is quick and effective. If spinning returns, go back, because BPPV recurs and can be repositioned again. Seek urgent care for vertigo with a severe headache, double vision, slurred speech, weakness, numbness, trouble swallowing or an inability to stand, and for new hearing loss with vertigo.

If the manoeuvre worked and you are still dizzy weeks later, ask your clinician whether it is residual dizziness and whether a neuroplastic pattern fits. Then start learning and practising: keep moving your head, lie flat on purpose, use pacing to rebuild exposure to the environments that provoke you, and read our guide to central sensitization for the shared mechanism.

This article is for general education and is not medical advice, and it does not diagnose or treat any condition. Persistent symptoms deserve a proper medical assessment to rule out disease or injury before a neuroplastic explanation is considered. If your symptoms are new, changing, or come with red-flag signs such as fever, unexplained weight loss, numbness or weakness, chest pain, or loss of bladder or bowel control, see a clinician promptly.