Sudden Hearing Loss: Why It Is a Summer Emergency and What to Do
Losing hearing in one ear over hours or overnight is not something to wait out. Here is how to recognise sudden hearing loss and why acting within days can change the outcome.
By Hear With Ish • Published 28 July 2026 • Reading time 7 minutes
Sudden hearing loss is one of the few genuine emergencies in hearing care, and most people do not realise it until it happens to them. If your hearing drops sharply in one ear over a few hours, or you wake up with an ear that feels dead and muffled, that is a signal to seek help quickly rather than assume it will settle on its own. The reason is simple: the sooner it is treated, the better the chance of recovery, and the window is measured in days, not weeks.
We see more of these cases in the warmer months, when summer colds, ear infections, air travel and general busyness lead people to brush off a change in hearing as a blocked ear or a bit of wax. Often it is exactly that, and easily fixed. But when it is not, knowing the difference matters. Below we explain what sudden hearing loss is, how to tell it apart from a simple blockage, and the sensible steps to take if it happens to you or someone you love.
What Sudden Hearing Loss Actually Is
Sudden sensorineural hearing loss, sometimes shortened to SSHL, is a rapid drop in hearing that comes from the inner ear or the hearing nerve rather than a blockage in the ear canal. It usually affects one ear and develops over a period of up to three days, often overnight. Some people notice it the moment they wake, others realise it when they hold a phone to the affected ear and hear almost nothing.
The exact cause is frequently never identified, which surprises many patients. Viral infections, problems with blood flow to the inner ear, inflammation and, more rarely, other underlying conditions are all thought to play a part. Because the trigger is often invisible, the medical approach is to treat promptly rather than wait for a clear explanation. The NHS advises anyone with sudden hearing loss in one or both ears to be seen urgently, and its guidance on sudden hearing loss is a clear, reliable starting point.
Why the First 72 Hours Matter So Much
The single most important thing to understand is timing. Treatment for sudden sensorineural hearing loss, most commonly a course of steroids, works best when it begins within the first two to three days. Started early, it gives the inner ear the best possible chance to recover. Left for a fortnight, the same treatment is far less likely to help, and some of the loss may become permanent.
This is why sudden hearing loss is treated as an emergency in the same bracket as a sudden change in vision. It is not about panicking, it is about not waiting. If you notice a sharp, unexplained drop in hearing, the right response is to have it checked the same day or the next, not to give it a week to see if it improves. A quick professional hearing assessment can establish whether the loss is coming from the inner ear or from something simple in the canal, and that single distinction shapes everything that follows.
Act quickly
A sudden, unexplained drop in hearing in one ear should be treated as urgent. Aim to be seen within 24 to 48 hours. Do not wait a week to see if it clears.
Telling It Apart From a Simple Blocked Ear
Most muffled hearing is not an emergency. Ear wax, a summer cold, water trapped after swimming, or hay fever can all leave an ear feeling blocked, and these clear up or are easily treated. The difficulty is that they can feel very similar to sudden sensorineural loss from the inside, which is why a professional check is so useful. The signs below help point towards which sort of problem you may be dealing with.
| What you notice | More likely a blockage | More likely urgent |
|---|---|---|
| How fast it came on | Gradual, over days or weeks | Over hours or overnight |
| Fullness or pressure | Often, with a bunged-up feel | Can feel dead rather than full |
| Ringing or dizziness | Usually mild or absent | New ringing or vertigo is a red flag |
| Distorted or tinny sound | Sound is quieter but clear | Speech sounds distorted or robotic |
If a look in the ear shows wax, gentle water-free ear wax removal by microsuction often restores hearing on the spot, and that is a reassuring outcome. When the canal is clear but the hearing is still down, the picture changes and the priority becomes getting the right medical care quickly. A new bout of ringing in the affected ear, dizziness, or distorted speech alongside the hearing drop all raise the concern and should not be ignored.
What to Do If It Happens to You
If your hearing drops suddenly and unexpectedly, a calm, quick sequence of steps gives you the best outcome. None of them are complicated, and the whole point is to avoid the one mistake that costs people their hearing: waiting.
1Do not wait it out
Treat a sudden, unexplained drop in one ear as urgent. Contact your GP, an audiologist or NHS 111 the same day, and ask to be seen quickly rather than booking a routine appointment for next week.
2Get the ear examined
A professional can look inside the canal and rule out simple wax or infection in minutes. If the ear is clear, that helps flag the loss as something that needs prompt medical treatment.
3Note the details
Jot down when it started, which ear, and any ringing, dizziness or recent illness. These details help whoever assesses you decide how urgently to act and what treatment fits.
4Follow through on treatment
If steroids or further tests are recommended, start them promptly and attend any follow-up. Recovery can continue over weeks, so a check of your hearing afterwards is worthwhile.
Once the urgent phase has passed, some people find their hearing does not fully return, and that is where ongoing support matters. If a degree of loss remains, a proper assessment and, where helpful, well-fitted hearing aids and solutions can make a real difference to everyday listening. The charity RNID has helpful information on sudden hearing loss and the emotional side of adjusting to it.
Why Summer Raises the Risk of Missing It
Summer does not necessarily cause sudden hearing loss, but it does make it easier to overlook. Colds and viral infections still circulate, swimming and water sports leave ears feeling blocked, and air travel can leave one ear muffled for a day or two. With so many everyday reasons for an ear to feel off, a genuinely urgent change can be waved away as just another blocked ear from the pool or the plane.
The safe habit is to treat any sudden, one-sided drop that does not clear within a few hours as worth checking, especially if it comes with new ringing or dizziness. If you are unsure whether what you are experiencing is a simple blockage or something more, it is always better to ask. A short visit for a check is a small price against the risk of missing a narrow treatment window.
Frequently Asked Questions
Is sudden hearing loss really a medical emergency?
Yes, when it comes from the inner ear. Treatment works best within the first two to three days, so a sudden, unexplained drop in hearing should be checked urgently rather than left to see if it improves on its own. Acting quickly gives the best chance of recovery.
How do I know if it is just ear wax or something more serious?
You often cannot tell from the outside, which is why a professional look inside the ear is so useful. Wax usually builds up gradually and clears with removal, while sudden sensorineural loss comes on fast, may feel dead rather than full, and can bring new ringing or dizziness.
What causes sudden sensorineural hearing loss?
In most cases no single cause is ever confirmed. Viral infections, reduced blood flow to the inner ear and inflammation are all thought to contribute. Because the trigger is often unclear, the medical approach is to treat quickly rather than wait for a definite explanation.
Can hearing come back after sudden hearing loss?
It can, and prompt treatment improves the odds. Some people recover fully, some partially, and some are left with a lasting degree of loss. Recovery can continue over several weeks, so a follow-up hearing check helps confirm where things have settled and what support might help.
Should I go to A and E or see an audiologist?
The key thing is to be seen quickly. Contact your GP or NHS 111 the same day, and if there is dizziness, weakness or severe symptoms, seek urgent medical care. An audiologist can examine the ear, check for wax or infection, and help guide you towards the right next step without delay.
Does flying or swimming cause sudden hearing loss?
Not usually. Flying and swimming can leave an ear feeling blocked or muffled for a short while, and that generally clears on its own. The concern is that these everyday causes can mask a genuinely urgent change, so a one-sided drop that does not settle within a few hours is worth checking.
Can you help if my sudden hearing loss has left lasting effects?
Yes. Once the urgent phase is over, a thorough hearing assessment shows exactly where your hearing stands, and if some loss remains, we can talk through options including well-fitted hearing aids and ongoing support. Every recommendation is tailored to you, with no pressure.
If in Doubt, Get It Checked
Sudden hearing loss is uncommon, but knowing what to do makes all the difference on the rare occasion it happens. If your hearing drops sharply in one ear and does not clear within a few hours, treat it as urgent and seek help the same day. If it turns out to be wax or a simple blockage, that is easily sorted and a relief. If it is something more, acting fast gives you the best chance. You can contact the clinic in Leicester for a prompt check and honest advice.
Noticed a Sudden Change in Your Hearing?
A prompt check can rule out simple causes and point you to the right care fast.
