Vestibular neuritis is inflammation of the vestibular nerve, the branch of your eighth cranial nerve that carries balance signals from your inner ear to your brain. When this nerve swells, it disrupts those signals on one side, triggering sudden, intense vertigo that typically peaks within 24 to 48 hours and lasts several days. The condition is benign and self-limiting, but the acute phase can be severe enough to cause nausea, vomiting, and difficulty walking.
What Causes It
The leading theory points to reactivation of herpes simplex virus type 1 (HSV-1), the same virus responsible for cold sores. HSV-1 DNA has been found in about 62% of vestibular ganglia in human temporal bone studies, suggesting the virus lies dormant near the balance nerve and can reactivate under certain conditions, much like it does to cause a cold sore on the lip. When it flares, the resulting inflammation damages the nerve fibers that relay motion and position data to the brain.
Not every case has a clear viral trigger. Some people develop vestibular neuritis after an upper respiratory infection, while others have no obvious preceding illness. The condition most commonly affects adults between 30 and 60, and it strikes both sexes roughly equally.
How It Feels
Symptoms develop over several hours and hit their worst point within the first day or two. The hallmark is persistent, spinning vertigo, not brief episodes but a continuous sensation of the room rotating around you. This is accompanied by nausea and often vomiting, along with significant balance problems that can make it hard to stand or walk without support. Your eyes may drift involuntarily to one side in a pattern called nystagmus.
One important distinction: vestibular neuritis does not affect your hearing. If you’re experiencing vertigo along with hearing loss or ringing in your ear, the condition is more likely labyrinthitis, a related but separate diagnosis where inflammation extends into the cochlea (the hearing part of the inner ear). In labyrinthitis, the hearing loss is often permanent. With vestibular neuritis, the cochlea is spared entirely.
The intense vertigo typically lasts one to two days, then gradually fades. Most people feel substantially better within a week, though milder dizziness, unsteadiness, and motion sensitivity can linger for weeks or even months as the brain recalibrates.
How Doctors Diagnose It
There’s no single blood test or scan that confirms vestibular neuritis. Diagnosis is largely clinical, based on your symptom pattern and a few targeted bedside tests. The most important of these is the HINTS exam, a three-step eye movement assessment that takes about a minute and is remarkably good at separating inner ear problems from something more dangerous like a stroke in the back of the brain.
The HINTS exam checks three things: the head impulse test (whether your eyes can stay locked on a target when your head is turned quickly), the pattern of your nystagmus (whether it always beats in the same direction or changes), and the test of skew (whether one eye sits higher than the other when you alternate covering each eye). In vestibular neuritis, you’ll typically have an abnormal head impulse response, nystagmus that beats in one fixed direction, and no skew deviation. This combination is actually more sensitive for ruling out stroke than an early MRI.
If further testing is needed, doctors may use caloric testing, which involves running warm or cool water into the ear canal to stimulate the balance organ, or a video head impulse test (vHIT) to precisely measure how well your vestibular nerve is functioning. In vestibular neuritis, both tests typically show reduced function on the affected side.
Treatment During the Acute Phase
In the first couple of days, treatment focuses on managing symptoms. Anti-nausea medications and vestibular suppressants help reduce the vertigo and vomiting enough that you can rest, eat, and stay hydrated. These medications are meant for short-term use only, because they can actually slow the brain’s natural recovery process if taken too long.
Corticosteroids, started within the first three days of symptoms, significantly improve how well the vestibular nerve recovers. A landmark trial published in the New England Journal of Medicine found that patients treated with a corticosteroid had a 61% improvement in vestibular function at 12 months, compared to 38% in those who received a placebo. About 76% of corticosteroid-treated patients achieved complete or near-complete recovery, versus only 27% of placebo patients. Antiviral medication alone showed no benefit, and adding it to corticosteroids didn’t improve results beyond the steroid alone.
Recovery and Vestibular Rehabilitation
Even after the acute vertigo fades, many people notice lingering unsteadiness, especially with quick head movements, in busy visual environments like grocery stores, or when walking on uneven ground. This happens because your brain is still learning to compensate for the weakened signal from the affected ear, a process called vestibular compensation.
Vestibular rehabilitation therapy speeds up this compensation. A therapist designs an exercise program targeting the specific deficits you’re experiencing. Common exercises include gaze stabilization, where you practice keeping your eyes focused on a fixed target while slowly moving your head side to side or up and down. Balance retraining progresses from standing with feet together, to a tandem stance (one foot in front of the other), to standing on one foot. Walking exercises may involve varying your speed, turning your head while walking, or navigating around obstacles. These exercises are practiced both in therapy sessions and at home.
The goal is to force the brain to rely on the good ear and other sensory inputs (vision and body position sense) to maintain balance. Most people see meaningful improvement within a few weeks of consistent exercise, though full recovery can take several months. Avoiding movement because it triggers dizziness actually delays recovery, so the general approach is to get moving as soon as the acute vomiting and severe vertigo subside.
Long-Term Outlook
Vestibular neuritis rarely comes back. A long-term follow-up study tracking 51 patients over an average of nearly five years found a recurrence rate of just 2%, with the single recurrence affecting the same ear and producing milder symptoms than the first episode.
One complication worth knowing about: some people develop benign paroxysmal positional vertigo (BPPV) in the weeks or months after vestibular neuritis. BPPV causes brief spinning episodes triggered by specific head positions, like rolling over in bed or looking up. It’s thought to result from debris dislodged in the inner ear during the initial inflammation. Unlike vestibular neuritis itself, BPPV is treated with simple repositioning maneuvers that a provider can perform in minutes.
Most people recover well from vestibular neuritis and return to normal activities. Early use of corticosteroids and an active vestibular rehabilitation program offer the best chance of a full recovery.