Sudden Unilateral Vestibular Failure

Written by Professor Vik Veer, Consultant ENT & Sleep Surgeon  ·  Published 30th August 2026  ·  Last reviewed 30th August 2026

Professor Vik Veer explains sudden unilateral vestibular failure — why it happens, what your eyes reveal about your recovery, and how to retrain your brain.

The Worst Vertigo There Is

There is a condition that causes the single worst vertigo I ever see. Patients are vomiting, they cannot stand, they cannot get to the toilet, they are so distressed that they end up in hospital — and it goes on for days. It is genuinely one of the most miserable things that can happen to a person, and yet the mechanism behind it is beautifully simple. Once you understand what has gone wrong inside your ear, you understand why the vertigo happens, and, far more importantly, you understand exactly how to fix it.

The proper name for it is sudden unilateral vestibular failure. That is all it means: one of your ears, for whatever reason, has abruptly stopped working, and the world starts going round and round.

Vestibular Neuritis, Labyrinthitis, AUVP — The Names Explained

The naming causes endless confusion, so let us clear it up first.

Vestibular neuritis (sometimes vestibular neuronitis) means the balance nerve has been knocked out, usually presumed to be by a virus or a post-viral inflammatory process. Hearing is entirely normal. This is by far the commonest version.

Labyrinthitis means the whole inner ear labyrinth is involved, so you lose balance and hearing together, often with tinnitus.

Those two words get used interchangeably all the time, and that is simply wrong. There are a great many people walking around who have been told they had labyrinthitis, and yet their hearing was never affected at all. If your hearing is normal, it was vestibular neuritis. This is not pedantry — the distinction matters clinically, because sudden one-sided deafness appearing alongside acute vertigo raises the possibility of a stroke in the AICA territory, and that changes everything about how urgently you need to be assessed.

Since 2022, the Bárány Society — the international body that writes the diagnostic criteria for balance disorders — has recommended the broader term acute unilateral vestibulopathy (AUVP) for this whole picture.^[1] It is the more honest label, because it describes what has actually happened (one balance organ has failed acutely) without pretending we always know the cause. You may also see it called acute vestibular syndrome, which is the umbrella term for any continuous vertigo lasting more than 24 hours, or unilateral vestibular hypofunction, which is what we call the residual state afterwards.

How Balance Actually Works — Three Systems, Two Ears

To understand any of this you have to understand that balance is not one sense. It is three, working together.

Your eyes tell you where the horizon is, what is moving around you, and where you are relative to the world. Your legs — the position sense in your joints and muscles — tell you where your body is in space, so that if you begin to lean one way you correct before you topple. And your ears, the vestibular organs, are mostly there for rotation and acceleration. Close your eyes and have somebody spin your chair: you know you are turning. Step into a windowless lift: you know you are going up.

Here is the part that explains everything. Your two vestibular organs work as a matched, opposed pair. The way I describe it in clinic is that one ear pushes this way, one ear pushes that way, and the two forces cancel out to keep you straight. Both organs are firing constantly — even when you are sitting perfectly still, each one is sending a steady stream of nerve impulses, and the brain is comparing them. Equal and opposite. Balanced.

Now suppose one ear suddenly dies. The other ear carries on pushing exactly as before, but there is nothing opposing it any more. And your brain — remember, it is a piece of flesh sealed inside a bony box with no direct knowledge of the outside world — has no way of knowing that anything has been damaged. All it sees is a massive, sustained imbalance between the two sides. The only thing that normally produces a signal like that is a violent, continuous rotation. So that is what the brain concludes is happening. The world is spinning. And it commits absolutely to that conclusion, which is why the sensation is so overwhelming and so utterly convincing.

Why Your Eyes Flick — Nystagmus, and What It Tells You

If you look closely at someone in the acute phase, you will see their eyes doing something extraordinary: drifting slowly to one side and then flicking rapidly back. That is nystagmus, and it is the single most useful sign in the whole condition.

It happens because of a hard-wired reflex between the balance organs and the eye muscles, called the vestibulo-ocular reflex or VOR. Its normal job is to hold your gaze steady when your head moves — turn your head left, and your eyes automatically roll right by exactly the same amount, so the world stays still. When one ear fails, the unopposed healthy ear is telling the brain that the head is rotating continuously, so the VOR obediently and continuously drags the eyes in the opposite direction. That is the slow phase, and it drifts towards the failed ear. Then the brain says, no, I want to be looking straight ahead, and snaps the eyes back. That is the fast phase, and it beats away from the failed ear.

Two practical consequences follow.

First, it tells you which ear is the problem. The slow drift is towards the bad side; the quick flick is towards the good side. Nystagmus is conventionally named after its fast phase, so "right-beating nystagmus" means the left ear has failed.

Second, it tells you how far your recovery has got. Nystagmus of this type obeys Alexander's law: it is strongest when you look in the direction of the fast phase, and weakest when you look the other way. So as the brain compensates, it retreats through three recognisable grades:

Grade	Where you can see the flicking	What it means
Grade III	In every direction of gaze — including when you look towards the bad ear	Acute, uncompensated. Usually the first few days.
Grade II	Looking straight ahead, and looking towards the good ear. Gone when looking towards the bad ear.	Compensation under way.
Grade I	Only when looking towards the good ear	Well advanced.
None	No flicking in any direction	Static compensation essentially complete — typically 2 to 6 weeks.

The First Few Days — What It Actually Feels Like

The onset is abrupt, often on waking. Within minutes to an hour you are in the grip of continuous rotational vertigo. Not the few seconds of spinning you get with BPPV when you roll over in bed — this is relentless, and it is still there hours later.

Almost everyone vomits, repeatedly, because the vestibular nuclei sit right next to the vomiting centre in the brainstem. You cannot keep fluids down. You cannot stand. Most people find they instinctively lie very still, on their side, with their eyes turned in the direction the unopposed ear is already pushing them — because fighting it makes everything worse. Many people also find, correctly, that lying with their eyes open and locked onto a fixed point like the corner of the ceiling is better than lying with them closed, because vision suppresses the nystagmus and gives the brain something honest to hold onto.

Any attempt to move — to reach the toilet, to sit up, to eat — sets the whole thing off again. This is why people end up in A&E: not principally because of the vertigo itself, but because after 12 hours of vomiting they are dehydrated, their potassium is falling, and they physically cannot look after themselves.

The reassuring part is that this is the worst it will ever be. The severity peaks in the first 24 hours and then, quite reliably, begins to ease.

"I had a very helpful, 30-minute video consultation with Dr Veer to discuss a personal health situation. Dr Veer impressed me as being an exceptionally knowledgeable, assiduous, humane, and down-to-earth physician and surgeon. He thinks synthetically, looking at many aspects of the situation and integrating them into a deep understanding that benefits the patient." Google Review, 5 stars — Benjamin Abelow MD

Is It a Stroke? The HINTS Examination

This is the question that matters most in the first few hours, because a cerebellar or brainstem stroke can produce vertigo, vomiting and unsteadiness that look, to the patient and to the untrained eye, identical to vestibular neuritis. Somewhere between 3 and 5 per cent of people presenting with acute vestibular syndrome are actually having a stroke, and a proportion of those are missed.

The most important thing to understand is that a normal CT head scan does not exclude it. CT is poor at seeing the posterior fossa and misses the great majority of acute strokes in this area. Even an early MRI with diffusion-weighted imaging misses roughly one in ten in the first 24 to 48 hours.

What does work is a three-part bedside eye examination called HINTS — Head Impulse, Nystagmus, Test of Skew. In the landmark study, HINTS performed by trained examiners was more sensitive than early MRI-DWI for detecting stroke in acute vestibular syndrome.^[2]

Test	Vestibular neuritis (peripheral)	Stroke (central)
H — Head impulse test[3]	Abnormal — when the head is turned quickly towards the bad ear, the eyes are dragged off target and have to make a visible corrective flick back	Normal — the eyes stay locked on target. A normal head impulse in someone with severe ongoing vertigo is the single most worrying finding of the three.
IN — Nystagmus	Horizontal with a torsional component, always beating in the same direction whichever way you look, suppressed by visual fixation	Direction-changing on lateral gaze, or purely vertical, or purely torsional. Not suppressed by fixation.
TS — Test of skew	Absent — no vertical movement on alternate cover testing	Present — one eye drifts vertically and corrects when uncovered (skew deviation)

The mnemonic for the dangerous combination is INFARCT: Impulse Normal, Fast-phase Alternating, Refixation on Cover Test. Any one of those three findings should prompt urgent imaging and a stroke assessment. There is also "HINTS plus", which adds a bedside hearing check — new one-sided hearing loss with acute vertigo is a red flag, not a reassurance, because the labyrinth and the cerebellum share a blood supply through the anterior inferior cerebellar artery.

Two important caveats. HINTS is only valid in a patient who has continuous vertigo with nystagmus present at the time of examination — it is meaningless for episodic dizziness, or for someone whose vertigo has already settled. And its accuracy depends heavily on the examiner having been trained in it; in inexperienced hands it can be falsely reassuring.

The Other Tests, and What They Add

Once the emergency question is settled, further testing is about confirming the diagnosis and quantifying the loss. A pure tone audiogram separates neuritis from labyrinthitis and is essential. The video head impulse test (vHIT) measures the VOR gain of each individual semicircular canal and gives an objective number for the deficit. Caloric testing — irrigating each ear with warm and cool water or air and measuring the resulting nystagmus — remains the classic way of demonstrating a "canal paresis" on the affected side, and it is the outcome measure most of the steroid trials used. VEMPs (vestibular evoked myogenic potentials) test the otolith organs and can show whether the superior nerve alone or both divisions were affected. An MRI is not needed in a typical case, but is indicated where HINTS is not reassuring, where hearing has been lost, where recovery stalls unexpectedly, or where there are any other neurological signs.

One thing worth knowing before you have these: the test result is not the same thing as your symptoms. It is entirely normal to feel almost back to normal while your caloric test still shows a large one-sided weakness, and equally possible to feel dreadful when the numbers look reasonable. Do not let a number distress you.

Acute Treatment — The First Three Days

Treatment splits neatly into three categories: settling the acute symptoms, drug treatment aimed at the nerve itself, and rehabilitation to drive central compensation.^[4][5] The first two matter for a few days. The third is what actually determines how you are in six months.

Symptomatic and supportive care

In the acute phase, vestibular suppressants and antiemetics genuinely help with severe vertigo, nausea and vomiting.^[4][6] The drug classes used are antihistamines (cinnarizine, cyclizine, dimenhydrinate, promethazine), anticholinergics (hyoscine), antidopaminergics (prochlorperazine — "Stemetil" — and metoclopramide) and GABAergic agents such as benzodiazepines.^[5] In controlled trials, intravenous dimenhydrinate 50 mg outperformed lorazepam and was comparable to droperidol.^[5] Intravenous fluids are given when vomiting prevents drinking,^[4] and potassium often needs replacing after a day or two of vomiting.

What these drugs actually do is worth understanding, because it explains the single most important instruction on this page. A vestibular sedative works by stopping your brain from listening to your ears. It effectively cuts the line. That is a remarkable thing for a tablet to do, and it is why you feel better almost immediately: the unopposed, false rotation signal from your good ear is no longer getting through, and your brain falls back on your eyes and your legs.

Corticosteroids — the honest picture

Steroids are the most argued-about part of the whole condition, and you deserve the real answer rather than a confident one.

The case in favour starts with the landmark trial by Strupp and colleagues in the New England Journal of Medicine in 2004. In 141 patients, methylprednisolone significantly improved recovery of peripheral vestibular function at 12 months — 62.4 per cent versus 39.6 per cent on placebo.^[7] Several meta-analyses since have found a significant improvement in canal paresis on caloric testing at one month compared with placebo,^[8][9][10] and a 2022 meta-analysis of 15 trials reported an advantage in the acute phase (odds ratio 3.1, number needed to treat 6) and in later vestibular restoration (OR 2.4, NNT 7).^[11]

The case against is equally serious. Multiple systematic reviews — including the Cochrane review^[9] — and a well-conducted 2024 placebo-controlled double-blind randomised trial found no significant long-term benefit on caloric recovery or on subjective symptoms.^[8][12] Crucially, across the meta-analyses there is no significant difference in Dizziness Handicap Inventory scores at any time point.^[8][10][9] One randomised trial found methylprednisolone added nothing beyond vestibular exercises alone.^[13] And side effects are meaningfully more common than with placebo, with a number needed to harm of about 4 — hyperglycaemia, dyspepsia, mood disturbance, insomnia.^[11][14][8] The 2022 meta-analysis itself cautioned that heterogeneity and risk of bias limit its own findings.^[11]

Question	What the evidence shows
Does it improve caloric function at 1 month?	Yes — consistently across meta-analyses[8][15][9]
Does that persist to 12 months?	Disputed — significant in some meta-analyses,[15][10] not confirmed by the 2024 RCT[12]
Does the patient feel less dizzy?	No significant difference in DHI scores at any time point[8][10][9]
Are there side effects?	Yes — higher than placebo, NNH ≈ 4[11][14][8]

Read that table honestly and the conclusion is: steroids improve the test result more convincingly than they improve the patient. My own position, which is a fairly mainstream one, is that a short course started early is reasonable in a healthy patient with a clear-cut diagnosis, after an individual assessment of risk — and is best avoided in poorly controlled diabetes or hypertension, where the guidance is explicit that a risk-benefit assessment should come first.^[11] The regimens described in the literature are prednisolone 100 mg daily reducing by 20 mg every three days,^[11][5] or prednisone 1 mg/kg/day for five days with a taper.^[16][5] What steroids must never be is a substitute for rehabilitation — and if you were not offered them, you have not missed out on much.

Antivirals — do not bother

This one is refreshingly clear. Valacyclovir, given alone or combined with a corticosteroid, showed no therapeutic effect on vestibular neuritis outcomes.^[4][7][5] Methylprednisolone plus valacyclovir was no better than methylprednisolone alone.^[7] Antivirals are not indicated for ordinary vestibular neuritis. (Herpes zoster oticus — Ramsay Hunt syndrome, with the painful vesicular rash and facial weakness — is a different condition and does need antiviral treatment.)

Why You Must Come Off the Vestibular Sedatives

This is the single most important thing on this page, and it is the thing most often got wrong.

Vestibular sedatives are wonderful for 48 hours and actively harmful after that. The reason is that recovery does not come from the ear healing — it usually does not. Recovery comes from central compensation: the brain gradually recalibrating, working out that the asymmetry between the two ears is not a real rotation, and reweighting how much attention it pays to each input. It turns down the volume on the failed side, leans a little more on the eyes and the legs, and rebalances the resting activity in the vestibular nuclei.

But the brain can only do that if it is allowed to receive the faulty signal and correct for it. A drug that blocks the signal blocks the correction. The literature is entirely consistent on this: these agents should be limited to the first one to three days, because prolonged use impedes central vestibular compensation.^[5][17][16]

So you will be asked to stop them, and coming off is genuinely unpleasant. You will feel dizzy again. Every time the last dose wears off, some of that unsteadiness returns. I want to be direct about this: you have to let that dizziness happen to you. It is not a relapse and it is not a sign that something has gone wrong. It is the sensation of your brain finally being given the information it needs. If you keep dulling it out, you will still be dizzy in a year's time.

Practically: most people are off them within three to five days. If you have been on prochlorperazine for weeks or months, do not stop abruptly and unsupervised — reduce over a week or two while you build up the exercises below, and speak to whoever prescribed them. Long-term prochlorperazine also carries a real risk of drug-induced parkinsonism, particularly in older patients, which is another reason it should never become a repeat prescription.

Vestibular Rehabilitation — Does It Work?

Yes, and this is where the strongest evidence in the whole condition sits. Vestibular rehabilitation therapy (VRT) drives central compensation and is recommended as a primary treatment, not an optional extra.^[18][14][19]

• A meta-analysis of 12 randomised controlled trials found VRT comparable to steroids on both Dizziness Handicap Inventory scores and caloric lateralisation at 1, 6 and 12 months — and found that VRT combined with steroids beat steroids alone on DHI at 1, 3 and 12 months.^[18]
• A randomised trial of 65 patients showed that adding early supervised VRT to standard care significantly reduced perceived dizziness at 3 months (p=0.007) and at 12 months (p=0.001), and improved DHI, anxiety and visual analogue scores at 12 months.^[20]
• A classic controlled study demonstrated that vestibular exercises measurably improved central vestibulospinal compensation after vestibular neuritis, using posturography rather than questionnaires.^[21]
• The Cochrane review of vestibular rehabilitation for unilateral peripheral vestibular dysfunction found moderate to strong evidence that it is a safe and effective management approach.^[22]
• Starting early — ideally on the day of diagnosis — is recommended, and is associated with faster and more complete recovery.^[11][16]
• A modular approach combining VRT with cognitive behavioural techniques and structured patient education significantly improved 6-month outcomes and reduced the chance of the problem becoming chronic.^[16]

That last point deserves emphasis. The thing that turns a three-week illness into a three-year illness is not the size of the vestibular loss. It is avoidance — staying still, staying indoors, staying on the tablets, and being frightened of movement.

The Exercise Programme — Exactly What To Do

What follows is a staged programme built around the four things that have been shown to drive compensation: gaze stabilisation, static balance, dynamic balance and gait, and habituation. The structure and the dosing follow the clinical practice guideline for peripheral vestibular hypofunction published by the Academy of Neurologic Physical Therapy,^[23] which remains the most rigorous synthesis available, and the exercises themselves descend from the Cawthorne–Cooksey regimens first described in the 1940s^[24] and refined substantially since.

Stage 1 (Days 1–7): Gaze stabilisation — VOR ×1

This is the single most important exercise, and if you only ever do one thing, do this. It directly retrains the vestibulo-ocular reflex, and controlled work has shown that it is specifically the gaze stabilisation element, not simply moving about, that recovers dynamic visual acuity in unilateral vestibular loss.^[25]

1. Write a single large letter on a card, or use a business card. Hold it at arm's length, at eye level, against a plain wall.
2. Sit down (in the first days you may need to do this propped up in bed).
3. Keep your eyes locked on the letter. This is the whole exercise — the letter must stay in focus and readable throughout.
4. Now turn your head from side to side, roughly 20–30 degrees each way. Not a big sweep — about the amount you would turn to check a wing mirror.
5. Go as fast as you can while the letter stays sharp. If it blurs or doubles, you are going too fast. That is roughly two head turns per second.
6. Continue for one minute. Stop. Rest 30–60 seconds until any dizziness settles.
7. Repeat, this time nodding the head up and down while keeping the letter in focus. One minute.

Dose: 4–5 repetitions of each direction, three times a day. That gives you at least 12 minutes of gaze stabilisation daily, which is the minimum recommended in the acute and subacute phase.^[23] In the chronic phase the recommendation rises to around 20 minutes a day. Yes, it is tedious. It is also the bit that works.

Stage 1b: Gaze shifting between two targets

Place two targets on the wall about 60 cm apart at eye level. Look at target A. Now, without moving your head, flick your eyes to target B — then turn your head to follow, keeping your eyes on B. Pause. Reverse. Repeat for one minute. This retrains the eye-head coordination you use every time you cross a road.

Stage 2 (Week 1–3): Static balance — Romberg progressions

Stand next to a wall or worktop with someone nearby. Hold each position for 30 seconds, three repetitions, twice daily. Work down the list, and only move to the next line when you can hold the current one comfortably with your eyes closed.

1. Feet hip-width apart, eyes open → eyes closed
2. Feet together (Romberg), eyes open → eyes closed
3. Feet together on a cushion or folded pillow, eyes open → eyes closed
4. Semi-tandem (heel of one foot beside the big toe of the other), eyes open → eyes closed
5. Full tandem (heel directly in front of toe), eyes open → eyes closed
6. Tandem on a cushion, eyes open → eyes closed
7. Standing on one leg, eyes open → eyes closed

Once a position is easy, add head movement: hold the stance and slowly turn your head left and right, then up and down, for 30 seconds. Adding head turns to a balance task is what makes it a vestibular exercise rather than just a leg exercise.

Stage 3 (Week 2–6): Dynamic balance and gait

1. Walking with head turns. Walk 10 metres down a corridor while turning your head left and right, roughly every two or three steps, in time with your walking. Five lengths. Then repeat nodding up and down — this one is usually harder.
2. Walk and stop. Walk normally and stop abruptly on a signal, without stepping out to catch yourself. Then walk and turn 180 degrees on the spot.
3. Narrow-base walking. Walk heel-to-toe along a line on the floor, arms out, 10 steps.
4. Surface changes. Deliberately walk from hard floor onto thick carpet, then onto grass, then gravel. Changing surface forces the brain to stop over-relying on your feet.
5. Sit-to-stand ×10 without using your hands, then with a head turn as you rise.
6. Ball toss. Throw a ball hand-to-hand in front of you, then over and around your head, while standing. Adds an unpredictable element.

Stage 4 (Week 3 onwards): Habituation — deliberately provoking it

Habituation is for the specific movements that still make you dizzy. The principle is repeated, controlled, brief exposure.

1. Make a list of the 3–4 movements that reliably provoke you. Score each out of 10.
2. Pick the ones scoring around 2 to 4 — moderate, not devastating.
3. Perform each movement, briskly, and hold the end position for 10–20 seconds until the dizziness begins to fade.
4. Repeat each one three times, twice a day.
5. Re-score weekly. When a movement drops to 0–1, retire it and promote a harder one.

Typical provoking movements to use: sitting to lying down quickly onto the affected side and sitting up again; bending forward to pick something off the floor and straightening quickly; turning the head rapidly while walking; rotating the trunk side to side while sitting; looking up at a high shelf; scanning a supermarket shelf from end to end.

Stage 5 (Week 6 onwards): Back into the real world

The final stage is deliberately putting yourself into the environments that a compensated brain has to handle. Supermarkets. Escalators. Railway stations. Walking in the dark. Crowds. Driving as a passenger. Cycling. Dancing — genuinely, dancing is one of the best vestibular exercises there is, because it demands head movement, unpredictable direction changes and balance all at once. If you play sport, go back to it. The brain will not develop a skill it is never asked to use.

You may also find the free Visual Motion Trainer on this site useful at this stage. It provides graded moving visual patterns to practise with at home, which is exactly the kind of visual-vestibular conflict you need to be exposed to before you tackle a busy supermarket.

Stage	When	Core content	Daily dose
1 — Gaze stabilisation	Day 1 onwards	VOR ×1 horizontal and vertical; gaze shifting	≥12 min, split over 3 sessions
2 — Static balance	Week 1–3	Romberg progressions ± head turns, firm → foam	3 × 30 s per position, twice daily
3 — Gait	Week 2–6	Walking with head turns; surface changes; turns and stops	10–15 min, once or twice daily
4 — Habituation	Week 3+	Targeted provoking movements, ×3 each	Twice daily
5 — Real world	Week 6+	Busy environments, dark, sport, dancing	Daily life

VOR ×2 — a note for later. Once VOR ×1 is easy, the advanced version is VOR ×2: you move the card in one direction while turning your head the opposite way, keeping the letter in focus. This demands a VOR gain of two rather than one and is a considerably harder stimulus. It is worth introducing at around week 4–6, briefly, and only if VOR ×1 no longer provokes anything.

Tracking Your Own Recovery — Three Home Tests

Beyond simply feeling better, there are three objective things you can check yourself. Track them weekly and write the numbers down; the trend is far more informative than any single reading.

1. Nystagmus grade

As described above. Film your eyes in slow motion, in dim light, looking straight ahead, then left, then right. Progression from grade III → II → I → none is the clearest single marker of static compensation, and it typically completes over two to six weeks.

2. The Romberg test

Stand with your feet together, arms held straight out in front of you, on a firm floor. Have someone standing beside you. Close your eyes and hold it for 30 seconds.

What you are doing is removing your eyes from the equation. Your ears are already only half working. So you are forcing your brain to balance on your legs alone — and if the failed ear is still pushing you off-centre without correction, you will find yourself drifting or falling, characteristically towards the affected side. As compensation improves you will hold it steadily. Progress it by standing on a cushion, which also degrades the information from your legs.

3. The Unterberger (Fukuda) stepping test

This is the most sensitive of the three, and the one that will still show something years later. Stand in a clear space with your arms held straight out in front of you like a zombie, close your eyes, and march on the spot — knees up, 50 steps at a steady pace. Then open your eyes and see which way you are now facing.^[26]

With your eyes closed and your feet repeatedly leaving the ground, you have removed vision and heavily degraded the information from your legs. Almost the only thing left steering you is your vestibular system — which is precisely why it exposes a residual asymmetry that everything else has learned to hide. If one ear is still pushing, you rotate, and you rotate towards the affected side.

Early on, people rotate 90 or even 180 degrees, or lose their balance entirely — so do this with someone with you. As you compensate, the rotation shrinks. Two honest caveats: healthy people rotate too (up to about 30 degrees is unremarkable), and the test on its own is not accurate enough to diagnose which ear is affected — it has been shown to have poor specificity in isolation. Use it as your own trend measure, not as a diagnosis. Having said that, if you had a bad episode of vertigo years ago and you try this now and find yourself consistently swinging round to one side, that is real information about a deficit you have compensated for but never fully lost.

"An excellent consultation — I felt Mr Veer listened to me and treated me as an individual. It helped me feel that taking responsibility for my condition was reasonable and that we could move forward in a practical way together." Google Review, 5 stars — Hilary Martin

How Long Does Recovery Take?

There are two separate processes, and confusing them causes a great deal of unnecessary worry.

Peripheral recovery — the ear itself getting better — is partial at best. Depending on the series, somewhere around half of patients still show a measurable one-sided weakness on caloric testing years later. In many people the balance organ on that side never works properly again.

Central compensation — the brain adapting — is the one that determines how you feel, and it is remarkably reliable.

Milestone	Typical timing
Peak severity	First 24 hours
Able to get out of bed and walk to the bathroom	3–5 days
Off vestibular sedatives	3–5 days
Back to light work / desk work	1–3 weeks
Spontaneous nystagmus gone (static compensation)	2–6 weeks
Comfortable with fast head movement, driving, busy environments (dynamic compensation)	3–6 months
Sport, cycling, walking in the dark on uneven ground	3–12 months

Things that slow compensation down: staying on vestibular sedatives; bed rest and avoidance; poor vision or new glasses that have not been updated; peripheral neuropathy or significant arthritis reducing the reliability of the legs; anxiety and fear of falling; migraine; and older age. Things that speed it up: starting the exercises early, being supervised at least initially, and getting back into normal daily activity as soon as it is safe.

When It Does Not Settle — Three Things To Look For

If you are still significantly dizzy three months on, do not accept "it just takes time". There is usually a specific, identifiable and treatable reason.

1. PPPD (Persistent Postural-Perceptual Dizziness). By far the commonest. The brain stays locked in the emergency setting it adopted during the acute attack — permanently discounting the inner ear and over-relying on vision. The result is chronic unsteadiness that is worst in busy, visually complex environments: supermarket aisles, escalators, traffic, scrolling on a phone. Every test comes back normal, and patients are frequently told there is nothing wrong with them. There is. Vestibular neuritis is one of its commonest triggers, and it responds well to treatment. There is a full guide on the PPPD page.

2. Secondary BPPV. The same insult that damaged the balance nerve can loosen the otoconia — the calcium crystals — in the utricle, and they migrate into a semicircular canal. This is a well-recognised consequence of vestibular neuritis and is one of the commonest identified causes of secondary BPPV.^[27] The clue is a change in the pattern: on top of the general unsteadiness you develop brief, violent 10–30 second spins specifically on rolling over in bed, lying down, or looking up. It is diagnosed with a Dix-Hallpike test and cured in minutes with a repositioning manoeuvre. It is missed constantly, because everyone assumes the dizziness is just the neuritis dragging on. See the BPPV page.

3. The diagnosis was never right. If the "attacks" keep coming back, it was probably not vestibular neuritis in the first place — see the next section.

Two other possibilities are worth naming: uncompensated vestibular hypofunction, where compensation simply stalled because of avoidance or ongoing sedative use and which responds to a properly supervised rehabilitation programme; and anxiety and fear of falling, which is an extremely common and entirely understandable consequence of a terrifying illness, and which will keep the whole cycle running if it is not addressed. Structured education, cognitive behavioural techniques and rehabilitation delivered together significantly improve outcomes and reduce chronicity compared with rehabilitation alone.^[16]

"I Get Labyrinthitis Every Few Months" — Almost Certainly Not

This comes up constantly, and it is worth being blunt about. Sudden unilateral vestibular failure is, in the overwhelming majority of cases, a one-off event. Long-term follow-up studies find recurrence in the same ear to be uncommon.^[28]

The reason is mechanical rather than mysterious. The first episode largely destroys the balance function on that side. There is very little left to lose. Even in the unlucky patient who is hit again, the second event tends to be far less dramatic, because it is only finishing off a small residue — and the brain has already learned to discount that ear anyway.

So if you are having repeated episodes of vertigo lasting hours or days, several times a year, the label is wrong and you should go back to a balance clinic. The realistic alternatives are:

• Vestibular migraine — the commonest cause of recurrent spontaneous vertigo by a wide margin, frequently without any headache at all. Attacks last minutes to days.
• Ménière's disease — vertigo attacks of 20 minutes to 12 hours with fluctuating hearing loss, ear fullness and tinnitus on the same side.
• BPPV — brief, positional, seconds not hours, and highly recurrent by nature.
• PPPD — continuous background unsteadiness with bad days that get misremembered as discrete attacks.
• Vestibular paroxysmia, superior canal dehiscence, or autoimmune inner ear disease — rarer, but each has a specific treatment.

Driving, Work and Flying

Driving. Under DVLA rules, you must stop driving and notify the DVLA if you are liable to sudden and disabling attacks of giddiness or vertigo; driving may resume once symptoms are satisfactorily controlled. The standards are considerably stricter for Group 2 (bus and lorry) licences.^[29] In practice, after a single episode, most people are safe once the spontaneous vertigo has gone, they are off vestibular sedatives (which are sedating in their own right), and they can turn their head to check a blind spot without the world lurching. Test that deliberately as a passenger first. Discuss it with the clinician managing you rather than deciding alone.

Work. Desk work is usually possible within one to three weeks, though screens and strip lighting can be surprisingly provoking early on — a larger font, reduced screen brightness and regular breaks help. Work at height, on ladders, with heavy machinery, or driving for a living should wait until dynamic compensation is well established.

Flying. There is no absolute barrier once the acute phase has passed, and the condition is not made worse by cabin pressure changes. Long flights are simply tiring, and fatigue makes an incompletely compensated system feel worse. Airline pilots and cabin crew are subject to separate aeromedical regulation and must be formally cleared.

Alcohol is worth avoiding in the early weeks. It is directly toxic to the vestibular system in the short term (it is literally a cause of positional nystagmus) and it interferes with the recalibration you are trying to achieve.

Glossary

Term	What it means
Acute vestibular syndrome	Any continuous vertigo lasting more than 24 hours with nausea and unsteadiness — an umbrella term, not a diagnosis
AUVP	Acute unilateral vestibulopathy — the current Bárány Society term for this condition
Canal paresis	A reduced response from one ear on caloric testing — the objective measure of the loss
Central compensation	The brain rebalancing its use of the two ears, the eyes and the legs. This is what recovery actually is.
DHI	Dizziness Handicap Inventory — a 25-item questionnaire, the standard patient-reported outcome measure
Nystagmus	Involuntary rhythmic eye movement, with a slow drift and a fast corrective flick
Oscillopsia	The visual world appearing to bounce or blur when you move your head
Otoconia	The calcium carbonate crystals in the utricle. Dislodged, they cause BPPV.
VOR	Vestibulo-ocular reflex — the ear-to-eye connection that holds your gaze steady when your head moves
vHIT	Video head impulse test — an objective camera-based measurement of the VOR for each canal

The Honest Summary

Sudden unilateral vestibular failure is a brutal illness for about a week and then a rehabilitation problem for a few months. One ear stops working, the other keeps pushing, and your brain — which has no way of knowing what has happened — concludes the world is spinning and makes you violently sick. Hospital treatment, fluids, anti-sickness medication and a short course of a vestibular sedative get you through the acute phase. Steroids may help the measured function of the ear and probably do not change how you feel; antivirals do nothing at all.

The ear itself will often never fully recover, and that is genuinely all right, because recovery does not come from the ear. It comes from the brain recalibrating — and the brain can only do that if you let it feel the imbalance and correct for it. That means coming off the sedatives even though it feels worse, doing the gaze stabilisation and balance exercises every single day even though they make you dizzy, and pushing yourself back out into the world rather than shrinking away from it.

The people who do badly are almost never the ones with the biggest vestibular loss. They are the ones who stayed on the tablets, stayed at home, and stopped moving. Enormous numbers of people are walking around, driving, working and playing sport with one balance organ that does not function at all — and they have entirely normal lives. Get the right diagnosis, do the exercises, stay motivated, and you will very probably be one of them.

Frequently Asked Questions

References

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Page created 30th August 2026 by Professor Vik Veer, Consultant ENT & Sleep Surgeon. This page is patient education and does not replace individual medical assessment. Acute vertigo with new deafness, headache, double vision, slurred speech, limb weakness, or an inability to walk unaided is a medical emergency — call 999 or attend A&E.