CION Ameerpet
Hearing loss or ringing in just one ear is usually caused by something simple and treatable. Rarely, it is the first clue to a benign tumour called an acoustic neuroma — and finding it early protects your hearing.
If sound has faded in one ear, or one ear is ringing, your first thought may be the worst one. Take a breath. The vast majority of one-sided hearing loss causes are common and treatable — earwax, an infection, fluid, or a temporary inner-ear problem. A tumour is a rare explanation.
But "rare" is not "never". A small number of people with a one-sided hearing change turn out to have a benign tumour called an acoustic neuroma (vestibular schwannoma). The good news is that it is slow-growing, not cancer, and far easier to treat when caught small. That is why doctors take a one-sided change seriously — not to alarm you, but to be sure. This page walks you through the common causes first, then the red flags that warrant a scan, and exactly how a specialist team in Hyderabad investigates it.
Acoustic neuromas are uncommon — the U.S. National Institute on Deafness and Other Communication Disorders (NIDCD) estimates roughly 1 in every 100,000 people per year is diagnosed with one. Yet because it is a leading tumour-related cause of unilateral (one-sided) sensorineural hearing loss, ENT and neuro-oncology guidelines recommend that persistent or unexplained one-sided hearing loss or tinnitus be evaluated with a hearing test and, where indicated, an MRI of the internal auditory canals.
These everyday causes account for the overwhelming majority of one-sided hearing changes. Most are easily diagnosed and treated by an ENT specialist.
A simple plug of impacted earwax is one of the most frequent causes of sudden muffled hearing in one ear. It can also cause ringing and a feeling of fullness. Once the wax is gently removed, hearing usually returns straight away.
Infections (otitis media) and fluid build-up behind the eardrum reduce hearing in the affected ear, often with pain or pressure. Common after a cold. Most settle with treatment, though persistent fluid may need review.
A rapid drop in hearing in one ear — over hours to a few days — is an ENT emergency. Often linked to a virus or inner-ear problem. Prompt treatment improves recovery, so do not wait if hearing drops suddenly.
Loud noise — a concert, machinery, or a one-off blast near one ear — can damage hearing. It usually affects both ears, but exposure on one side (for example, a phone or firearm) can make one ear worse.
An inner-ear disorder causing episodes of fluctuating hearing loss, ringing, fullness, and vertigo — usually in one ear. It is benign but recurrent, and is managed by an ENT specialist.
A benign tumour on the balance nerve next to the hearing nerve. It is an uncommon cause, but the classic reason doctors investigate persistent one-sided hearing loss or ringing — because finding it early protects hearing. Learn more about acoustic neuroma.
Most one-sided hearing changes are benign. But certain patterns are exactly the ones a specialist wants to assess with a hearing test and, where indicated, an MRI — so that the rare tumour is caught while it is small. See a doctor promptly if you notice:
Remember: these patterns do not mean you have a tumour. They mean the change is worth investigating properly. Speak to a CION specialist if any of these apply to you, or explore the dedicated acoustic neuroma page for more detail.
We're never more than 30 minutes away. Same panel of specialists at every centre. Same tumour board reviews. Same NCCN protocols. Pick the closest one and call directly — or let us pick for you.
CION Ameerpet
CION Kukatpally
CION L.B. Nagar
CION Tolichowki
CION Masab Tank
CION Banjara Hills
CION Kompally
CION Balanagar
CION Siddipet
CION Sangareddy
Not sure which centre fits best? Tell us where you are — we'll suggest the closest one with the right specialists.
Help me pick the right centreTravelling for treatment? We may have a centre right where you are.
Don't see your city? Call 18002028726 — we'll find your nearest CION partner centre.
Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationShare your name and number — we'll call you back within 30 minutes to schedule your consultation.
Most causes are simple — but the only way to be sure is a hearing test and, if needed, an MRI. CION coordinates both quickly and reviews the results with you in plain language.
If a one-sided hearing change needs investigating, the pathway is straightforward and does not involve any biopsy. The aim is to first measure the hearing, then — only if the test points that way — confirm or rule out a tumour with a scan.
At CION we coordinate the audiogram and the dedicated MRI quickly, and our radiation and neuro-oncology team reviews the scan with you in plain language — so you understand the size, the location, and what it does (and does not) mean.
Because an acoustic neuroma is benign and often slow-growing, treatment is not always urgent. The choice depends on the tumour's size, how much hearing you have, your age, your symptoms, and your own preferences. Every case at CION is reviewed by a multidisciplinary tumour board so the recommendation balances tumour control against protecting your hearing and facial nerve.
For small tumours that are not growing — and where symptoms are mild — the safest option is often to monitor with periodic MRI. Many acoustic neuromas grow very slowly or not at all, so active monitoring avoids any unnecessary intervention while keeping a close eye on the tumour.
Despite the name, no cutting is involved. Stereotactic radiosurgery delivers a precise, focused dose of radiation to the tumour from many angles in one or a few sessions — to halt its growth while sparing surrounding tissue. It is a key option for small to medium tumours and for patients who prefer to avoid open surgery. CION coordinates SRS as part of specialist radiosurgery care.
For larger tumours, or where the tumour is pressing on the brainstem, surgical removal may be recommended. CION does not perform neurosurgery in-house — this surgery is delivered in coordination with our accredited neurosurgical partners, with CION's team managing the imaging, planning, and supportive care around it. Preserving the facial nerve and as much hearing as possible is central to surgical planning.
Why early detection matters: the smaller the tumour at diagnosis, the more options remain — and the better the chance of preserving useful hearing and facial-nerve function. That is the single most important reason not to ignore a one-sided hearing change.
Have a scan or hearing test you'd like reviewed? Book a free consultation or call 18002028726 to talk to a specialist about your options.
A one-sided hearing change is unsettling, and the uncertainty is often the hardest part. Our approach is simple: investigate properly, explain clearly, and recommend only what the evidence supports. For a confirmed acoustic neuroma, a second opinion is particularly worthwhile in three situations:
CION offers a dedicated, free written second opinion service. We will review your imaging and hearing tests, explain the findings, and set out the realistic options — with transparent costs and a tumour-board recommendation for every patient.
Want the wider picture? Explore our Brain Cancer & Tumour hub, the dedicated acoustic neuroma page, or learn how our team manages complex cases on the Brain Tumor Treatment in Hyderabad page.
An acoustic neuroma is not a brain cancer. It is a benign vestibular schwannoma that does not spread elsewhere in the body. The reason it is investigated under brain-tumour care is its location — at the junction of the hearing and balance nerves with the brainstem. According to NIDCD patient guidance, most acoustic neuromas are caught while small enough to be monitored or treated with hearing-preserving options, which is why a persistent one-sided hearing change should be assessed early.
Get a free written second opinion from CION's specialist team — especially valuable before deciding between watch-and-scan, radiosurgery, or surgery for an acoustic neuroma.
These aren't paid endorsements or written reviews. These are video testimonials from real patients and families — recorded on their own phones, in their own words. Pick any one. Watch it. Then decide.
Read all 800+ reviews on Google
Start Your Story. Book Free Consultation.Most one-sided hearing loss is not caused by a tumour. The common, treatable culprits include earwax blocking the canal, a middle-ear infection or fluid, a perforated eardrum, and sudden sensorineural hearing loss (an urgent ENT problem often linked to a virus). Noise damage and age-related change usually affect both ears, but can be uneven. An acoustic neuroma — a benign tumour on the hearing and balance nerve — is a rare cause. Even so, any hearing loss in one ear that does not clear quickly deserves an ENT review and a hearing test, because a small number of cases turn out to be a tumour that is far easier to treat when found early.
Ringing in one ear is very common and is usually benign — earwax, noise exposure, or a viral inner-ear problem. However, one-sided (unilateral) tinnitus, especially when it comes with hearing loss or a feeling of fullness in the same ear, is the classic early clue to an acoustic neuroma (vestibular schwannoma). The tumour is benign and slow-growing, but it presses on the hearing nerve. Ringing in both ears is far less likely to point to a tumour. The safe rule: new ringing confined to one ear should be checked with a hearing test and, if that is abnormal, an MRI of the internal auditory canals.
Diagnosis follows a clear, painless pathway. First an ENT specialist examines the ear and arranges a pure-tone audiogram (hearing test) — one-sided high-frequency loss raises suspicion. The definitive test is an MRI of the internal auditory canals with gadolinium contrast, which can detect a tumour just a few millimetres across. No biopsy is needed because the imaging appearance is characteristic. A balance assessment may be added if dizziness is present. At CION we coordinate the audiogram and the dedicated MRI quickly, and our radiation and neuro-oncology team reviews the scan with you so you understand the size, location, and the realistic options.
No. An acoustic neuroma — properly called a vestibular schwannoma — is a benign (non-cancerous) tumour. It grows from the Schwann cells that wrap the vestibular (balance) nerve next to the hearing nerve. It does not spread to other parts of the body. The concern is purely local: as it grows it can press on the hearing nerve, the balance nerve, and occasionally the facial nerve or brainstem. Because it is benign and often slow-growing, many small tumours are simply monitored. When treatment is needed, the goal is to control growth and protect nerve function — not to fight a cancer.
There are three established approaches, chosen by tumour size, your hearing, your age, and your preference. Observation ("watch and scan") with periodic MRI suits small tumours that are not growing. Stereotactic radiosurgery (SRS) delivers precise, focused radiation in one or a few sessions to halt growth without open surgery — a key option CION coordinates as part of specialist radiosurgery care. Microsurgical removal is used for larger tumours and is delivered in coordination with our accredited neurosurgical partners (CION does not perform neurosurgery in-house). Every case is reviewed by a multidisciplinary tumour board so the recommendation balances tumour control with hearing and facial-nerve preservation.
See a doctor promptly for any of these: hearing loss in one ear that comes on suddenly (within hours to days — this is a medical urgency); one-sided hearing loss or ringing that is persistent and not improving; a sense of fullness or pressure in one ear with reduced hearing; unsteadiness or dizziness alongside the hearing change; or facial numbness or weakness on the same side. Most causes are benign and easily treated, but these patterns are exactly the ones that should be assessed with a hearing test and, where indicated, an MRI — so the rare tumour is caught small.
Not necessarily. Outcomes depend on the tumour size, how much hearing remains at diagnosis, and the treatment chosen. Early detection is the single biggest factor in preserving useful hearing — small tumours treated with stereotactic radiosurgery or monitored carefully give the best chance of keeping hearing. Larger tumours and microsurgery carry a higher chance of hearing loss on that side, though the other ear is unaffected. Protecting the facial nerve is also a priority in planning. This is why a one-sided hearing change should never be ignored: the sooner it is investigated, the more options remain to protect your hearing and balance.
Browse our complete guide to brain tumours and brain cancer — symptoms, scans, tumour types, treatment, prognosis and life after treatment. Tap any topic to read more.