Sudden hearing loss — a drop of at least 30 decibels within 72 hours, usually in one ear and often with new tinnitus — needs same-day medical assessment, because the useful treatment window is measured in days and weeks, not months.
Most tinnitus develops gradually and is managed over months or years. This is the exception: the situation where new tinnitus is a reason to act quickly on something else, the hearing.
If this is happening now
- Get seen today. An ENT clinic if one can see you, otherwise urgent care or an emergency department. The US National Institute on Deafness and Other Communication Disorders (NIDCD) advises treating sudden deafness as a medical emergency and seeing a doctor immediately.
- Say "sudden hearing loss", and when it started. The time since onset shapes what can be offered. Mention any medicine taken shortly before, too: Viagra, Cialis and related drugs carry a label warning about sudden hearing loss.
- Expect a hearing test, and ask for one if it is not offered. A pure-tone audiogram is what separates inner-ear (sensorineural) loss from a blocked ear such as earwax or fluid. The 2019 US guideline asks for it as soon as possible, and within 14 days of onset.
- Say at once if both ears are affected, if this has happened before, or if you have any new neurological symptom such as weakness or numbness. The guideline asks clinicians to look for exactly these, because they point towards causes that need a different path.
- Do not wait to see whether it clears. About half of people recover some or all of their hearing on their own, but nobody can tell in advance who.
Why the first days matter
The first 72 hours are part of the definition: the drop develops over up to three days, sometimes all at once. What happens in those days and the ones right after decides what can be offered.
The case for going the same day rests on three things. The diagnosis needs a hearing test, and a muffled ear that turns out to be wax or fluid needs different treatment from an inner-ear loss. The checks for causes that need a different path — both ears, repeat episodes, neurological signs — are made at that first assessment. And the treatment windows close. The 2019 guideline makes steroids an option within two weeks of onset, and NIDCD notes that delaying diagnosis and treatment can decrease how well treatment works, and that treatment delayed by more than two to four weeks is less likely to reverse or reduce permanent hearing loss.
How much each day matters inside the first week is less settled than urgent-care advice suggests. A 2005 prospective study from Paris treated 326 patients within seven days of onset and, in the 249 who could be assessed at 30 days, found no significant difference in hearing whether treatment started within the first 24 hours or later that week. That is a reason not to despair if you could not be seen the same day. It is not a reason to wait, because the window that matters runs in days to a couple of weeks, and it closes whatever happens.
About half of people with SSHL recover some or all of their hearing on their own, often within one to two weeks. That is not a reason to wait and see either: there is no reliable way to know in advance whether you are in the half that recovers, and delay removes options that work better earlier.
What counts as "sudden"
Sudden sensorineural hearing loss (SSHL) is generally defined as a drop in hearing of at least 30 decibels, across at least three connected frequencies, developing within 72 hours — sometimes all at once, sometimes over a day or two. It's usually in one ear. The 2019 guideline describes it as frequently but not universally accompanied by tinnitus, vertigo or both, and NIDCD adds that people may also notice a feeling of fullness in the ear or dizziness.
The 2019 guideline puts the incidence at 5 to 27 per 100,000 people a year, about 66,000 new cases a year in the United States, and says more than 90% of cases are idiopathic — no cause is ever identified. Hearing loss that follows an operation or a spinal anaesthetic is one of the rarer settings.
This is different from the gradual, cumulative hearing loss covered in the article on tinnitus and hearing loss — that kind develops over years and isn't an emergency. SSHL, by definition, happens fast enough to notice within days, and sometimes within minutes.
Why it's easy to dismiss at first
NIDCD notes that people with SSHL sometimes put off seeing a doctor because they think the hearing loss is down to allergies, a sinus infection, earwax plugging the ear canal or another common condition. It is an understandable mistake. Many people first discover the loss on waking in the morning, others when they put a phone to the affected ear, and some hear a loud "pop" just before their hearing goes; alongside it there may be a feeling of fullness in the ear, dizziness or ringing, all of which can pass for something minor in the moment. The detail that should change the calculation is speed: a drop that develops within 72 hours, sometimes all at once, is the pattern that defines SSHL, and a hearing test is what tells it apart from a blockage such as earwax or fluid.
What happens at the appointment
The standard first step is pure tone audiometry (a hearing test) to confirm sensorineural hearing loss and rule out simpler explanations like earwax blockage. What a first audiology appointment involves describes the tests, though an urgent assessment for sudden hearing loss moves faster than a routine visit. If SSHL is confirmed, corticosteroids — taken by mouth, or injected through the eardrum into the middle ear as intratympanic steroids — are the usual first-line treatment, and the guideline's window for starting them is within two weeks of onset.
What the 2019 US guideline recommends
The American Academy of Otolaryngology–Head and Neck Surgery Foundation's clinical practice guideline on sudden hearing loss was updated in 2019. Its key action statements are graded by strength, and the grading is the most useful part for a patient: it shows where the evidence is firm and where it is not.
Strong recommendations — clinicians should:
- tell sensorineural hearing loss from conductive hearing loss when a patient first presents with sudden hearing loss
- explain the natural history of the condition, the benefits and risks of treatment, and the limits of the evidence for it
- counsel people left with hearing loss or tinnitus about the possible benefits of audiologic rehabilitation and other support
Strong recommendations against — clinicians should not:
- order a routine CT scan of the head at the first assessment (this does not cover a targeted scan of the temporal bone)
- order routine laboratory tests
- routinely prescribe antivirals, thrombolytics, vasodilators or vasoactive substances
Recommendations — clinicians should:
- check the history and examination for sudden loss in both ears, repeated episodes, or focal neurological findings
- obtain audiometry as soon as possible, within 14 days of onset
- look for a cause behind the ear with an MRI scan or an auditory brainstem response test — the route by which an acoustic neuroma is found or ruled out
- offer intratympanic steroids when recovery is incomplete 2 to 6 weeks after onset
- repeat the hearing test at the end of treatment and within 6 months of finishing it
Options, the weakest grade — clinicians may:
- offer corticosteroids as initial treatment within 2 weeks of onset
- offer hyperbaric oxygen combined with steroids, within 2 weeks of onset as initial treatment, or within 1 month as salvage treatment
Two things stand out. The treatment everyone expects, steroids, sits in the weakest category — an option rather than a recommendation — which matches the trial evidence below. And the guideline's one statement about tinnitus is a strong one: people left with hearing loss or tinnitus should be told what rehabilitation and support can offer.
The awkward fact about the treatment itself
Steroids are the standard first-line treatment for sudden sensorineural hearing loss, given urgently and almost universally. The Cochrane review of that practice is less confident than the practice is.
It found three trials, 267 participants, and judged all three at high risk of bias. Their results do not agree:
- One found no effect of oral steroids on hearing compared with placebo.
- One found hearing improved in 61% on oral steroids against 32% of controls.
- One found no effect, in a trial that did not follow strict inclusion criteria and whose analysis was limited by substantial exclusions and poor compliance.
Its conclusion: the value of steroids in idiopathic sudden sensorineural hearing loss remains unclear, because the randomised evidence is contradictory and the studies are too small.
This does not change the urgency, and it is important not to read it as though it does. The reason to be seen within days is that the treatment window closes, and a treatment with uncertain evidence given inside the window is a far better position than the same treatment given after it. The US guideline still offers steroids within two weeks of onset, the potential loss is permanent, and nobody has a better option to offer instead.
What it should change is what you expect. The standard treatment for this condition rests on three small, contradictory trials, which is worth knowing if your hearing does not come back — that outcome is common, it is not evidence that you were treated wrongly or too slowly, and the honest state of the field is that nobody can yet say how much the steroids contribute.
Does a higher steroid dose work better?
If steroids help, would more help more? The HODOKORT trial, run across German hospitals and published in NEJM Evidence in 2024, tested that in 325 patients with sudden hearing loss of at least 50 dB, randomised within 7 days of onset to one of three five-day courses:
- high-dose intravenous prednisolone, 250 mg a day
- high-dose oral dexamethasone, 40 mg a day
- the control: oral prednisolone at 60 mg a day, followed by 5 days of tapering doses
Hearing improved by a similar amount in all three. Measured across the three worst-affected frequencies at day 30, the mean gain was 34.2 dB with high-dose prednisolone, 41.4 dB with high-dose dexamethasone and 41.0 dB with the standard course (P = 0.09). Side effects went the other way: 73 and 76 adverse events related to the trial medication in the high-dose groups, against 46 on the standard course. The authors' conclusion is that high-dose steroids were not superior to a lower dose and carried a higher risk of side effects.
Two limits belong with it. Every group received steroids, so the trial cannot say whether steroids beat no treatment — the question the Cochrane review could not settle. And tinnitus was a secondary outcome whose result the trial's abstract does not report, so it is not described here.
Why the evaluation looks past the ear
Most sudden sensorineural hearing loss never gets a cause assigned to it, and treatment starts without one because the steroids cannot wait for an answer. But part of what an evaluation is doing is checking the short list of causes that would change what happens next, including a stroke at the back of the brain — which is what the guideline's instructions to look for focal neurological signs and to image behind the ear are for. Syphilis is one of them: otosyphilis is treated with the antibiotic regimen used for neurosyphilis, not with steroids alone.
One of those is neurological. A 2018 systematic review concluded that sudden sensorineural hearing loss can be an early manifestation of multiple sclerosis and should always be considered in the differential diagnosis, especially in women — in the studies it reviewed, sudden hearing loss was the only presenting symptom in 43% of the female subjects. Multiple sclerosis and tinnitus covers what those reviews found and, just as usefully, what they did not: tinnitus on its own, with normal hearing, is not the presentation they describe.
The tinnitus connection
If SSHL is caught and treated early enough that hearing substantially recovers, tinnitus that appeared alongside it often improves too, though not always completely. If hearing loss ends up being permanent despite treatment, any resulting tinnitus is typically managed afterward with the same evidence-based approaches used for other tinnitus — sound therapy, hearing aids where appropriate, and CBT for tinnitus-related distress.
Does sound therapy help the tinnitus that comes with it?
A 2025 randomised controlled trial in BMC Medicine asked exactly that, in 213 participants with idiopathic sudden sensorineural hearing loss, comparing standard care against standard care plus acoustic therapy.
In the short term, nothing separated the groups. No significant difference in tinnitus resolution, nor in tinnitus handicap, the Tinnitus Questionnaire, anxiety, depression, general quality of life or sleep quality. That is a comprehensively null result across seven outcomes at once.
The positive finding is narrower. In long-term analysis, among patients with severe ISSHL specifically, those continuing acoustic therapy at home had higher tinnitus resolution — 45.5% against 20.0%, p = 0.034. No serious adverse events occurred.
Handle that second result carefully, because of where it sits. It is a subgroup finding, in a secondary long-term analysis, after a primary analysis that found nothing — which is the configuration most likely to produce a result that fails to replicate. A p-value of 0.034 carved out of a null trial is weak evidence rather than strong. The authors' own conclusion is suitably tentative: acoustic therapy may not provide immediate relief but shows potential for sustained resolution in severe cases, with timing and duration still to be optimised.
The practical reading: sound therapy is low-risk and this trial found no harm in it, but nothing here supports expecting it to clear the tinnitus in the weeks after sudden hearing loss. The treatment that matters urgently in that window is the one aimed at the hearing, which is what the first half of this article is about.
Tinnitus with sudden hearing loss is a good sign, not a bad one
This is counterintuitive enough to state plainly, because the instinct runs the other way.
A 2026 meta-analysis in Otology & Neurotology pooled 10 studies and 4,782 patients — 3,590 who had sudden hearing loss with tinnitus, 1,192 without. Every included study scored 7 or above on the Newcastle–Ottawa Scale, a reasonable quality bar for observational work.
Hearing recovery was more common in the group who had tinnitus: 57.44% against 50.84%, and the association held statistically (odds ratio 0.60, 95% CI 0.42–0.85), with substantial heterogeneity between studies (I² = 67.2%).
Subgroup analyses using the Siegel recovery criteria, and restricted to systemic corticosteroid treatment, pointed the same way. One subgroup did not: among patients treated with intratympanic corticosteroids the association was not significant (OR 0.80, 95% CI 0.45–1.44).
The authors read tinnitus as a favourable prognostic indicator for hearing recovery, suggest systemic corticosteroids might be more effective in patients who have it, and propose tinnitus as a way of stratifying treatment in future studies.
Two cautions belong with it. This is observational data, so tinnitus is a marker of better recovery rather than a cause of it — nobody is suggesting the ringing does the recovering. And an I² of 67.2% means the studies varied considerably in what they found.
What it is good for is the question people ask in that first week: the ringing that arrived with your sudden hearing loss is not, on this evidence, a sign that your hearing is less likely to come back. If anything it points mildly the other way.
What usually happens to the tinnitus over time
A 2026 study in Acta Oto-Laryngologica followed 195 patients through treatment for sudden sensorineural hearing loss and tracked their Tinnitus Handicap Inventory scores:
- Baseline: 48.99
- One month: 28.33
- Six months: 16.97
- Eighteen months: 10.54
That is a fall from moderate-to-severe handicap into the range most scoring systems call slight, over a year and a half, with most of the drop happening in the first month.
One caveat about what this study can and cannot tell you, because it matters and cuts both ways. Every patient in it received ginkgo biloba extract — the study compared two doses against each other and had no untreated arm. That makes it useless as evidence that ginkgo did anything (and the ginkgo article treats it that way). But for the question "what typically happens", an uncontrolled cohort is exactly the right kind of evidence: it describes the trajectory of a real group of people over eighteen months, which is what a prognosis is.
So read it as a description rather than a treatment effect. The tinnitus that arrives with sudden hearing loss most often becomes substantially less troublesome over the following year, and the steepest improvement comes early.
What predicts a worse tinnitus outcome
The same study looked at what separated people who did less well, and found three factors associated with less favourable tinnitus outcomes at follow-up:
- Higher anxiety — a GAD-7 score of 10 or above
- Higher reflux symptom burden — a Reflux Symptom Index of 13 or above
- A history of vestibular disorders
The anxiety finding fits a wider pattern in tinnitus research: distress predicts outcome more reliably than audiometry does, which is why the treatments with the best evidence aim at distress. The reflux association is more unexpected and should be treated as a single observational finding rather than an established link; acid reflux and tinnitus sets it beside the other reflux research.