My Child Suddenly Cannot Hear Properly in One Ear — What Should I Do?
A child suddenly saying:
“I can't hear out of this ear”
can be surprisingly worrying.
Sometimes they describe the ear as blocked. Sometimes sounds seem far away or “underwater”. An older child may notice the difference immediately when using headphones, while a younger child may simply turn their good ear towards you.
In many children there is a relatively straightforward explanation, such as earwax, middle-ear fluid or an ear infection.
But there is one important message parents should know:
A genuinely sudden, unexplained reduction in hearing should not automatically be assumed to be wax or glue ear.
Current NHS advice recommends urgent medical assessment when a child develops sudden hearing loss in one or both ears.
Understanding the different types of hearing loss helps explain why.
How does a child normally hear?
Sound travels through three main areas.
The outer ear collects sound and carries it down the ear canal.
The sound vibrates the eardrum and tiny middle-ear bones.
These vibrations then reach the cochlea, the hearing organ of the inner ear, where they are converted into electrical signals carried along the hearing nerve towards the brain.
A problem anywhere along this pathway can reduce hearing.
That means two children saying exactly the same thing — “my ear is blocked” — can have quite different causes.
What is conductive hearing loss?
Conductive hearing loss means sound can't travel efficiently through the outer or middle ear.
In children, common examples include:
- earwax
- an object in the ear canal
- middle-ear fluid or glue ear
- acute ear infection
- eardrum perforation.
These causes are often treatable or temporary.
Glue ear, for example, produces a conductive hearing loss because fluid behind the eardrum interferes with normal movement of the eardrum and middle-ear system. South Tees NHS describes glue ear as the commonest cause of conductive hearing loss and notes that hearing may fluctuate.
What is sensorineural hearing loss?
Sensorineural hearing loss arises from the inner ear or hearing nerve pathway rather than a simple blockage.
This distinction matters when hearing changes suddenly.
Sudden sensorineural hearing loss is much less common in children than ordinary conductive problems such as middle-ear fluid, but it still deserves prompt specialist assessment.
The difficulty for parents is that the child may describe both conditions in exactly the same way:
“My ear feels blocked.”
Looking into the ear and performing an appropriate hearing assessment can help distinguish them.
Can earwax suddenly block my child's hearing?
Yes.
A significant wax plug can reduce sound reaching the eardrum.
Children may notice:
- muffled hearing
- fullness
- an apparent sudden change after swimming or bathing
- difficulty hearing quiet speech.
However, do not insert cotton buds or other objects into the canal to investigate.
If a child reports a marked new hearing difference, examination is preferable to assuming wax is responsible.
Could it be glue ear?
Yes.
Glue ear is very common in childhood and hearing can fluctuate.
A child may seem to hear normally one week and struggle considerably in a noisy classroom the next.
Glue ear is particularly likely during colds and periods of Eustachian-tube dysfunction.
However, classic glue ear often develops less dramatically than a true instantaneous inner-ear hearing loss.
A child who suddenly notices a major unexplained difference in one ear still deserves assessment.
Can an ear infection reduce hearing?
Yes.
Inflammation and fluid behind the eardrum can temporarily interfere with sound conduction.
A young child with ear infection may:
- rub or pull the ear
- develop fever
- become irritable
- sleep poorly
- react less to sound.
The current NHS earache page specifically lists reduced reaction to sound as a sign parents may notice in younger children.
Hearing generally improves as the infection and middle-ear fluid resolve, although fluid can sometimes persist afterwards.
What if hearing does not return after an ear infection?
Arrange reassessment.
The NHS advises GP review when hearing has not returned after treatment for an ear infection or wax build-up.
Persistent fluid behind the eardrum is one possible explanation.
Audiology can measure how much hearing is affected rather than relying on observation alone.
Could something be stuck in the ear?
Yes, particularly in younger children.
Beads, pieces of toys, paper, foam and other small objects may be inserted without a parent witnessing it.
One-sided hearing reduction can be a clue.
Do not probe the ear or attempt difficult removal at home because this can push an object deeper or damage the canal or eardrum.
NHS earache guidance recommends medical assessment if something is stuck in the ear.
Can loud noise cause sudden hearing change?
Potentially.
Very loud sound close to the ear can injure the auditory system.
Examples might include an explosion, firework or exceptionally loud amplified sound.
A child reporting hearing reduction, tinnitus or significant ear symptoms after major acoustic trauma should be assessed rather than simply waiting for it to disappear.
What if my child also hears ringing?
Ringing, buzzing or another internally generated sound is called tinnitus.
Tinnitus can accompany several ear conditions and does not by itself tell us the cause.
However, new tinnitus together with sudden one-sided hearing loss increases the importance of prompt assessment.
NICE tinnitus guidance also recognises the combination of sudden hearing loss and tinnitus as requiring rapid specialist assessment, although its linked sudden-hearing-loss recommendation is based on the adult hearing-loss guideline.
What if my child feels dizzy too?
Balance symptoms add another important piece of information.
The hearing and balance organs sit together within the inner ear.
Sudden hearing loss accompanied by significant vertigo therefore warrants prompt medical assessment.
Seek more urgent help if dizziness is severe, the child cannot walk normally, is repeatedly vomiting, has facial weakness or develops other neurological symptoms.
How can I tell whether my child really has one-sided hearing loss?
Parents can notice useful clues, but home testing cannot reliably determine the type or severity of hearing loss.
You may notice that your child:
- turns one ear towards you
- swaps the telephone to one particular side
- struggles when spoken to from one direction
- increases device volume
- repeatedly asks “what?”
- performs differently depending on where they sit.
Do not repeatedly test them with very loud sounds close to the ear.
Formal paediatric audiology is safer and far more informative.
How is a child's hearing tested?
Hearing testing is adapted to developmental age rather than expecting every child to press a button like an adult.
The NHS describes several approaches.
Visual reinforcement audiometry can be used with younger children, teaching them to turn towards a sound and rewarding the response with a visual stimulus.
Play audiometry turns hearing testing into a game — for example, putting an object into a container whenever a sound is heard.
Older cooperative children may undertake pure-tone audiometry through headphones.
This can help establish whether one ear genuinely hears differently from the other.
What is tympanometry?
Tympanometry assesses how the eardrum and middle-ear system respond to a small controlled change in pressure.
It can help identify problems such as:
- middle-ear fluid
- abnormal middle-ear pressure
- reduced eardrum mobility.
The NHS includes tympanometry among standard hearing assessments that may be used in children.
It is particularly useful when distinguishing a middle-ear problem from an inner-ear hearing loss.
Will my child need a scan?
Not every child with unilateral hearing loss needs imaging.
The first priorities are usually:
- establish whether hearing loss is genuinely present;
- determine its type and degree;
- examine the ears;
- consider the history and associated symptoms.
Further investigations depend on those findings.
Avoid assuming that a child with one-sided hearing loss automatically requires an MRI or CT scan.
Does sudden hearing loss always become permanent?
No.
The outcome depends heavily on the underlying cause.
Wax, middle-ear fluid and many infections can produce temporary conductive hearing loss.
Inner-ear hearing loss behaves differently, and recovery can vary.
This is why early assessment matters: the clinician needs to determine the type of hearing loss before discussing prognosis or treatment.
Should I wait a few days to see whether it improves?
For a gradually fluctuating problem already known to be glue ear, observation may sometimes be appropriate as part of an established clinical plan.
A new, sudden, unexplained hearing loss is different.
Current NHS guidance specifically says to seek an urgent GP appointment or NHS 111 if you or your child develops sudden hearing loss in one or both ears.
Do not delay solely because the ear “looks normal” from the outside.
What treatment might be needed?
Treatment depends entirely on the diagnosis.
Possible management may involve:
- managing wax
- treating an appropriate ear infection
- monitoring middle-ear fluid
- treating another identified middle-ear condition
- urgent specialist management when an inner-ear hearing loss is suspected.
Steroids are sometimes discussed in relation to sudden sensorineural hearing loss, but parents should not self-start steroid medication or use leftover prescriptions.
Treatment decisions in children require specialist assessment, consideration of the likely cause and weighing potential benefits against risks.
What does NICE say?
This needs careful wording.
NICE NG98 provides a clear emergency pathway for adults with unexplained sudden hearing loss: onset over three days or less within the previous 30 days should lead to immediate specialist referral, with the person seen within 24 hours.
That recommendation should not be relabelled as a paediatric NICE guideline.
For parents, the directly applicable source is the NHS hearing-test guidance, which explicitly includes children and advises urgent assessment for sudden hearing loss.
Why does early identification matter in children?
Hearing plays an important role in:
- speech development
- language
- classroom learning
- communication
- social interaction.
The NHS emphasises that identifying hearing problems early is important so that they can be appropriately treated or managed.
Even permanent unilateral hearing loss does not mean a child cannot communicate or thrive.
It means the child deserves appropriate audiological assessment, support and follow-up.
Red flags: when should parents seek urgent help?
Seek an urgent GP appointment or contact NHS 111 if:
- your child suddenly loses hearing in one or both ears
- hearing has deteriorated noticeably over days or weeks
- hearing loss occurs with earache
- hearing loss occurs with ear discharge.
Seek immediate emergency assessment if sudden hearing change is accompanied by concerning neurological or severe symptoms such as:
- new facial weakness
- significant difficulty walking
- severe uncontrolled vertigo
- altered consciousness
- severe head injury
- other sudden neurological symptoms.
Call 999 for collapse, reduced consciousness, a seizure, severe neurological symptoms or another immediately life-threatening situation.
Paediatric hearing assessment in London and Essex
Mr Gaurav Kumar, Consultant ENT Surgeon, assesses children with one-sided hearing loss, recurrent hearing problems, glue ear, ear infections and other paediatric ENT concerns across London, East London, Romford, Ilford, Redbridge, Brentwood, Chelmsford and surrounding areas of Essex.
London also has specialist paediatric audiology and audiovestibular services. Great Ormond Street Hospital for Children NHS Foundation Trust houses audiology, audiological medicine and ENT within its Sight and Sound Centre. University College London Hospitals NHS Foundation Trust also provides specialist paediatric audiology assessments linked with ENT care.
The key message for parents
Most childhood hearing changes are not caused by sudden permanent inner-ear hearing loss.
Wax, glue ear and infection are much more familiar explanations.
But the important safety message is:
Do not automatically assume a genuinely sudden loss of hearing is simply a blocked ear.
If your child suddenly cannot hear properly from one or both ears, arrange urgent medical assessment.
The first question is not whether the hearing loss will be permanent.
The first question is:
What type of hearing loss is it?
Once that is established, appropriate treatment, investigation or reassurance can follow.
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