Otitis media with effusion

01OverviewDefinition, clinical context and the essential points that orientate the chapter.

Glue ear describes fluid retained behind the tympanic membrane when middle-ear aeration is impaired. It may follow an acute infection or arise without a memorable painful episode. The child may ask for repetition, increase television volume, miss instructions or appear inattentive in a noisy classroom. These effects can be intermittent and are easily mistaken for behaviour alone. Assessment should therefore include information from home and education settings as well as the child’s own description where possible.

The clinical objective is useful access to sound while the condition resolves or is treated. A finding of fluid does not automatically mean an operation is needed, and a reassuring appearance on one visit does not remove persistent functional concerns. Current NICE guidance distinguishes OME without hearing loss from OME-related hearing loss, and separates unilateral from bilateral disease at reassessment. Families should receive practical communication advice immediately and participate in choosing among monitoring, devices and surgery.

Key points

Otitis media with effusion is middle-ear fluid without the acute inflammation or infection of acute otitis media.
Hearing can fluctuate, so apparently good listening on one day does not exclude an important problem.
Formal assessment combines clinical history and examination with hearing testing and tympanometry.
NICE NG233 applies to children under 12 years and bases decisions on hearing loss and its impact.
Reassess bilateral OME-related hearing loss after three months; consider the same interval for unilateral loss.
Earlier intervention can be appropriate when hearing difficulties significantly affect daily living.
Autoinflation, hearing devices and grommets are options to discuss according to the child’s needs and ability to participate.
Antibiotics, oral or nasal steroids, antihistamines and decongestants are not routine OME treatments.

02AetiologyUnderlying causes, associations and risk factors, with why each one matters.

Eustachian tube dysfunction

Poor ventilation and clearance allow middle-ear fluid to persist. Recent respiratory infections and local nasopharyngeal factors can contribute, while childhood anatomy helps explain why the condition is much more common in children.

Craniofacial and developmental context

Children with cleft palate, Down syndrome or other craniofacial differences have additional risks and assessment needs. Hearing difficulty may coexist with other developmental concerns rather than being their sole explanation.

Adult obstruction or inflammation

Adult effusion can follow an upper respiratory illness, but persistent disease may reflect an obstructed Eustachian tube. The nasopharynx requires consideration, particularly when one side remains affected without a clear transient cause.

03PathophysiologyThe causal sequence from the underlying abnormality to symptoms and harm.

1
Reduced sound conduction
Fluid and altered pressure limit movement of the drum and connected middle-ear structures. The resulting conductive deficit reduces speech audibility, especially when background noise competes with a quiet voice.
2
Fluctuating listening access
Middle-ear aeration changes over time, so measured hearing and everyday performance can vary. This makes repeated assessment and descriptions of real-life listening more informative than a single isolated observation.
3
Communication consequences
Missed speech sounds can affect participation, confidence and language learning. Supporting communication during observation addresses the child’s present needs without assuming that every episode causes permanent developmental harm.

04Clinical features and red flagsSymptoms, examination findings, patterns of presentation and time-critical warnings.

Hear the family’s examples

Ask about repetition, television volume, speech development, classroom listening and change over time. Seek examples from more than one setting and ask whether one ear appears better than the other.

Look for a compatible ear examination

An opaque or retracted drum, visible fluid or bubbles may support the diagnosis. Interpret these findings with hearing results rather than equating every dull drum with clinically important hearing loss.

Assess the wider child

Review development, speech, upper respiratory health, craniofacial features and the effect on daily life. A child who cannot describe symptoms may show listening difficulty through behaviour or participation.

Recognise the different adult question

Ask adults about duration, respiratory illness, nasal symptoms, bleeding, neck lumps and other unilateral symptoms. Refer persistent or unexplained effusion for ENT assessment, with the appropriate suspected-cancer pathway when indicated.

Red flags requiring action

Severe ear pain with fever, postauricular swelling or neurological signs requires reassessment for acute infection or its complications.
An adult with unexplained persistent unilateral effusion needs investigation rather than repeated treatment as an ordinary childhood glue-ear episode.
NICE advises considering a suspected cancer pathway for an adult of Chinese or south-east Asian family origin with hearing loss and effusion unrelated to an upper respiratory infection.
A child’s substantial communication, developmental or educational difficulty warrants action during observation rather than an automatic wait for a calendar threshold.

05InvestigationsWhat to request, why it matters and how to interpret it.

Investigation order

Read from the initial assessment onwards. Tests may run in parallel in urgent care; first-line, preferred, confirmatory, definitive and gold-standard labels appear only when the chapter explicitly states them.

01
Formal age-appropriate hearing assessmentFirst step
Why
Establish hearing level and whether one or both ears are affected.
Interpretation and limitations
Testing should be selected to match developmental ability and should assess whether the apparent deficit is consistent with middle-ear disease. Behavioural responses and parental reports complement each other but are not interchangeable.
02
Tympanometry with otoscopy
Why
Assess middle-ear mechanical function alongside visible anatomical findings.
Interpretation and limitations
A reduced-mobility or flat response can support effusion, but results require interpretation with canal volume, membrane appearance and test quality. Tympanometry is not a stand-alone measure of how well the child hears speech.
03
Scheduled repeat audiology
Why
Determine whether hearing has recovered or the management decision needs revision.
Interpretation and limitations
For bilateral OME with hearing loss, reassess after three months; consider this for unilateral loss. A significant daily-life impact can justify intervention sooner rather than waiting for repeat testing by default.
04
ENT assessment of persistent adult effusion
Why
Identify a local obstructing or otherwise important underlying cause.
Interpretation and limitations
Specialist examination may include the nasopharynx and further tests directed by findings. Do not apply the childhood observation pathway automatically to unexplained unilateral adult disease.

06Differential diagnosisRealistic alternatives and the features that help distinguish them.

Acute otitis media

An acute painful inflammatory illness with a bulging drum is a different condition. Fever or marked pain should trigger reassessment rather than being accepted as an inevitable feature of uncomplicated effusion.

Permanent sensorineural hearing loss

An effusion can coexist with permanent hearing impairment. Hearing that remains abnormal after fluid resolves needs investigation, and the presence of visible fluid should not prematurely end an audiological assessment.

Other conductive pathology

Wax, a perforation, ossicular disease or a concerning retraction pocket can also reduce conduction. Otoscopy and the pattern of test results help identify what is actually limiting sound transmission.

Attention or developmental difficulty

Listening problems can have more than one cause. Address hearing access while assessing persistent developmental or behavioural concerns on their own merits, rather than treating these as mutually exclusive diagnoses.

07ManagementImmediate care, first-line treatment, alternatives and escalation.

01First assessmentConfirm hearing and support communicationFirst stepSymptoms and examination suggest effusion in a child under 12.

1Arrange formal assessment with otoscopy, relevant clinical review, hearing testing and tympanometry to establish the problem.
2Explain that OME often resolves spontaneously and discuss its possible effect on hearing and participation without promising a fixed recovery date.
3Advise speaking nearby and face to face, reducing background noise, using visual support and informing the child’s teacher.
4If OME is present without hearing loss, reassure and explain how to return if hearing concerns develop.

02Active monitoringReassess with a meaningful endpointOME-related hearing loss is suitable for a period of observation.

1Arrange the three-month reassessment for bilateral loss and consider it for unilateral loss, while keeping practical hearing support in place.
2Consider autoinflation when the child can understand and perform it, and discuss hearing devices when useful for daily access to sound.
3Bring the management decision forward when hearing difficulty significantly affects everyday living instead of accepting avoidable exclusion at school or home.
4At reassessment discharge OME without hearing loss; for unilateral loss consider another three months or intervention according to impact, and discuss treatment for continuing bilateral loss.

03Intervention choiceSelect devices or surgery togetherPersistent hearing loss or functional impact makes further treatment appropriate.

1Discuss air-conduction hearing aids for suitable stable hearing loss and bone-conduction options when hearing fluctuates or air-conduction devices are unsuitable.
2Consider grommets for OME-related hearing loss, explaining temporary ventilation and the risks of infection, perforation and drum changes.
3When grommets are planned, consider adjuvant adenoidectomy unless assessment identifies a palatal abnormality, and discuss the separate surgical risks.
4Agree how hearing will be checked after treatment and how persistent or recurrent difficulty will lead back to assessment.

08ComplicationsImportant consequences, why they occur and why they matter clinically.

Educational and social effects

A child who misses quiet instructions or conversation may withdraw or respond inappropriately. Teachers and carers need specific communication strategies while the medical plan is under review.

Recurrent or persistent ear disease

Some children experience repeated episodes or drum retraction rather than a single self-limiting event. Ongoing hearing concerns and structural findings determine whether further ENT follow-up is necessary.

Missed underlying hearing impairment

Assuming that all loss is temporary can delay recognition of a coexisting permanent deficit. Confirm recovery objectively after an intervention and investigate hearing loss that remains.

09Monitoring and follow-upTreatment response, safety checks and longer-term review.

Ask whether communication at home and in education is improving, even when the family reports fewer ear symptoms.
Maintain the planned hearing reassessment and provide a route for earlier contact if daily impact increases.
Check device fit, comfort and use; teach families about small parts and safe storage of hearing-device batteries.
After grommet surgery arrange a hearing test at six weeks and investigate any persisting deficit.
Review children with additional needs individually because recurrent hearing loss may be harder for them to communicate.

10Special situationsVariants, exceptions and circumstances that change the usual approach.

Observation is not absence of support

A child can receive classroom adjustments, family communication changes and an appropriate hearing device while natural resolution is being assessed. These measures address the functional problem immediately.

Choose the device for the pattern

Fluctuation and recurrent otorrhoea can make an air-conduction device less suitable. Bone-conduction devices provide another option, but comfort, retention and the child’s preference still matter.

Avoid an unnecessary medicine trial

NICE advises against antibiotics, oral or nasal steroids, antihistamines, leukotriene antagonists, mucolytics, reflux medicines and decongestants for OME. Treat a separate proven condition on its own indication.

Use the current surgical framework

The current under-12 guideline considers adenoidectomy alongside planned grommets unless a palatal abnormality is present. An inherited age-only rule is not a substitute for this assessment and shared decision.

Address smoke exposure sensitively

Explain the association with household tobacco smoke and offer practical cessation support. Avoid blame; the immediate goal remains improving the child’s listening environment and access to assessment.

11Common pitfallsFrequent interpretation and management errors.

01
Do not label a child inattentive without considering fluctuating hearing access.
02
Fluid alone without hearing loss is not an automatic indication for surgery.
03
Repeated nasal steroid or antibiotic courses do not provide recommended treatment for uncomplicated OME.
04
A normal hearing screen long ago does not exclude a current or coexisting hearing deficit.