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Glue ear — known clinically as otitis media with effusion (OME) — is one of the most common reasons a young child struggles to hear. The middle ear, a chamber that should be full of air, fills instead with a thick, sticky fluid. Sound can no longer pass through it efficiently, so hearing becomes dulled and muffled. It is usually temporary, and it usually settles on its own, but while it lasts it can quietly affect listening, speech and confidence. Understanding what is actually happening inside the ear makes glue ear far less worrying — and makes it much easier to know when to ask for help.
How does the ear normally hear?
The ear has three parts: the outer ear, the middle ear and the inner ear. Sound waves are gathered by the outer ear and travel down the ear canal to the eardrum, setting it vibrating. Those vibrations are passed to the tiny bones of the middle ear, which carry them onwards to the cochlea in the inner ear. The cochlea converts the vibrations into electrical signals, and those signals travel along the hearing nerve to the brain, where they are finally understood as sound.
The crucial detail is this: the middle-ear bones do their work in an air-filled chamber, and they need that air in order to move freely. When the chamber fills with fluid, the bones are damped and sound is blocked on its way in. This is a conductive hearing loss — the hearing system itself is undamaged — which is why hearing almost always returns once the fluid has gone.
Why does fluid build up in the middle ear?
The middle ear is kept supplied with air by the Eustachian tube, a narrow passage running from the middle ear to the back of the nose and throat. It sits closed most of the time and opens periodically — when you swallow or yawn — to let fresh air in and allow fluid to drain away.
When that tube stops opening properly, two things happen. The cells lining the middle ear produce a small amount of fluid quite naturally, and a blocked tube gives it nowhere to drain. At the same time, the air already sitting in the chamber is gradually absorbed and is not replaced. The leading explanation is that this creates a partial vacuum — a negative pressure that draws further fluid out of the lining and into the middle ear itself. A child with a cold, a cough or an ear infection is also producing far more mucus than usual, and a tube that will not open cannot clear it. Colds and flu, allergies, exposure to other people's smoke, enlarged tonsils and adenoids, and conditions such as cleft palate or Down's syndrome all make glue ear more likely.
How common is glue ear in children?
Very common. According to the National Deaf Children's Society, 8 out of 10 children in the UK will experience glue ear before the age of 10, and around 1 in 5 pre-school children have it at any given moment. It can affect one ear or both.
What are the symptoms of glue ear?
Because there is often no pain, glue ear is easy to miss. The signs are usually behavioural rather than dramatic:
- Hearing that is dulled or muffled, particularly for quiet sounds and speech
- Not responding when called — what parents often describe as "selective hearing"
- Turning the television or a tablet up louder than before
- Speaking more loudly, or mishearing and needing things repeated
- Hearing sounds like ringing or buzzing (tinnitus)
- Earache, or a sense of pressure and fullness
- Balance problems, tiredness, poor concentration or frustration
- Over time, effects on speech, language development and progress at school
If an ear infection develops alongside the glue ear, your child may have earache, a high temperature, or discharge running out of the ear. That is worth a GP appointment.
How is glue ear diagnosed?
Diagnosis is straightforward. A clinician examines the eardrum with an otoscope, looking for the dull, retracted appearance of fluid behind it. A hearing test measures how much hearing has actually been affected, and tympanometry — a quick, painless test of how the eardrum moves — shows whether the middle ear is full of fluid rather than air.
How is glue ear treated?
Monitoring comes first. Most cases clear on their own, usually within about three months, so the NHS approach is to watch and reassess rather than intervene straight away. Where a child has glue ear in both ears with hearing loss, NICE guidance (NG233) advises reassessing hearing after three months of active observation.
There is no medicine that reliably clears glue ear. NICE is explicit that antibiotics should not be offered for glue ear itself — only for a secondary ear infection if one develops — and that antihistamines, decongestants, oral or nasal steroids and mucolytics should not be offered either. Homeopathy, cranial osteopathy, acupuncture, massage and dietary changes are also advised against. Monitoring is not doing nothing; it is the evidence-based option.
Auto-inflation is worth asking about. This is a technique in which the child blows up a special balloon using one nostril at a time, or swallows while holding the nostrils closed, several times a day — encouraging the Eustachian tube to open. NICE recommends considering it for children who are able to engage with it, and the NHS notes it is not usually recommended for children under 3.
If glue ear persists and hearing is affected, a hospital ENT team may consider hearing devices or surgery. NICE suggests considering air conduction hearing aids or bone conduction devices, and grommets. Grommets are inserted through a myringotomy — a tiny cut in the eardrum — and these small tubes act as ventilators, letting air back into the middle ear and allowing fluid to drain. They are not permanent: they work their way out naturally as the eardrum heals, usually within six to twelve months. Removing the adenoids is sometimes considered at the same time.
Can glue ear be prevented?
Not entirely — but the risk can be reduced. Keep children away from second-hand smoke, manage allergies and colds sensibly, and take repeated ear infections seriously rather than waiting them out.
What about glue ear in adults?
Adults get glue ear too, with the same muffled, blocked, underwater quality to their hearing. It is far less common, and that is exactly why it deserves proper attention: fluid in an adult's middle ear — especially fluid that persists in one ear only — should always be examined by a GP or ENT specialist, because in adults it can point to an underlying cause at the back of the nose that is worth ruling out. If your own hearing feels dulled or blocked, a full diagnostic hearing test with an audiologist will establish exactly what is happening and whether onward referral is needed.
When should you seek help?
If you are concerned about a child's hearing, speech or listening, your GP is the right first step — they can examine the ears and refer into NHS paediatric audiology or ENT where needed. VIP Hearing Solutions does not provide paediatric audiology. For adults, however, we are here: if sound has become muffled, distant or blocked, book in and let us find out why.
