01Purpose and principlesWhat the assessment is for and the core concepts behind it.
Otoscopy is most useful when it answers a defined clinical question. In someone with pain, it can identify an inflamed canal, a distended tympanic membrane or a complication needing further assessment. In someone with hearing difficulty, it can reveal an obstructed canal or a middle-ear explanation and determine whether formal hearing tests can proceed safely. The image must be interpreted alongside the chronology: a normal drum in a person who woke unable to hear is very different from the same appearance in someone with slowly progressive difficulty following conversation.
The external auditory canal has a more mobile cartilaginous outer portion and a sensitive bony inner portion. The tympanic membrane separates the canal from the middle ear. Its larger pars tensa and superior pars flaccida should both be considered during inspection, together with the handle of the malleus, membrane position and surrounding margin. Looking only for a light reflex can miss clinically important abnormalities elsewhere. A light reflex changes with the viewing angle and cannot, by itself, prove or disprove infection.
Prepare the encounter before approaching the ear. Ask about pain, discharge, previous perforation, grommets, mastoid surgery and recent treatment. Establish which ear is symptomatic and what the person hopes the assessment will resolve. Explain that the instrument stays in the canal, that they should remain still, and that they should signal pain promptly. Speak while the person can see your face, particularly before removing a hearing aid. A child or someone who finds examination distressing may need demonstration, a supportive companion and a carefully agreed position.
The examination should distinguish observation from interpretation. For example, an amber drum with an air-fluid level suggests middle-ear fluid, whereas a markedly bulging opaque drum in an acutely unwell patient supports an inflammatory middle-ear process. Neither a red colour alone nor the mere presence of wax fully explains every symptom. Record what is visible and why a particular diagnosis is favoured, while preserving uncertainty when debris, anatomy or discomfort prevents an adequate view.
Key points
- Explain the examination and obtain consent, using a communication method that the person can understand.
- Inspect the pinna, surrounding skin and mastoid region before placing an instrument in the canal.
- Use adequate illumination, a comfortable speculum and a hand position braced against the patient's head.
- Describe the canal, membrane integrity, contour, landmarks and any material behind or through the drum.
- A limited view must be recorded as limited; visible membrane fragments cannot establish that the whole drum is normal.
- Combine the image with symptoms, hearing assessment and previous ear surgery before choosing treatment or referral.
02Indications, selection and cautionsWhen it is useful, when urgency changes and important limitations.
Assess whether wax is merely present or actually obstructs examination or sound transmission. Oedema, tenderness, wet debris, a foreign body and focal skin lesions have different implications. Severe narrowing can conceal the membrane; do not assume it is intact because no perforation was seen.
Look for bulging, retraction, loss of translucency, a fluid level or air bubbles. Compare these with pain, fever, recent respiratory symptoms and hearing change. Redness can follow irritation or crying, so contour and the complete clinical pattern are more informative than colour alone.
Describe the site and approximate extent of a defect and whether discharge is present. Grommets, scars and a surgically altered cavity can change familiar landmarks. A known operation should prompt review of previous records rather than labelling an unfamiliar appearance as a new traumatic hole.
Inspect the attic and posterior membrane carefully for a deep pocket, crust or pale keratinous material. Persistent unpleasant-smelling discharge and unilateral hearing deterioration increase concern for cholesteatoma. The deepest part of a pocket may be hidden, so apparent surface size does not define disease extent.
Postauricular redness, swelling, focal tenderness, displacement of the pinna, vesicles or a previous surgical scar can redirect the examination. An ear complaint with systemic illness or cranial nerve findings needs assessment beyond the canal and drum.
A clear canal and intact membrane do not assess hair cells, the auditory nerve or central pathways. Persistent asymmetry, recurrent vertigo and sudden loss require further assessment even when the visible conductive pathway appears satisfactory.
03Method and interpretationA systematic approach to the test and its findings.
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
Structured history and inspection before otoscopyFirst step - Why
- Establish urgency, communication needs and procedural risks before instrumentation.
- Interpretation and limitations
- Determine the onset and progression of hearing change, associated neurological symptoms, previous surgery and any likely foreign body. Inspect both external ears and the adjacent skin; the examination should not begin with an unplanned attempt to remove visible material.
- 02
Systematic otoscopy of both ears - Why
- Identify canal and tympanic abnormalities using a safe, reproducible technique.
- Interpretation and limitations
- Select the largest speculum that fits comfortably, brace the examining hand and gently align the canal. Adults usually need upward and backward pinna traction; young children often need backward and sometimes downward movement. Adapt to anatomy and stop if pain, bleeding or movement makes the procedure unsafe.
- 03
Audiometry and selected tympanometry - Why
- Investigate hearing function and middle-ear mechanics when the history or findings indicate them.
- Interpretation and limitations
- Otoscopy helps determine whether the ear is suitable for testing. Audiometry quantifies hearing rather than relying on membrane appearance, while tympanometry can support assessment of fluid or pressure abnormalities. Interpret any flat trace with its ear-canal volume and the examination.
- 04
Specialist microscopy, endoscopy or directed imaging - Why
- Resolve an obscured view or investigate a suspected structural complication.
- Interpretation and limitations
- ENT examination can clarify a retraction pocket, polyp or altered cavity and permit controlled cleaning when appropriate. Imaging is selected for the suspected problem; a routine scan is not necessary for every visible abnormality, and an incomplete community examination should be described honestly in the referral.
04Clinical next stepsHow the result changes management or prompts escalation.
01Safe examinationObtain the view without causing injuryFirst stepThe patient consents to examination and can maintain a safe position.+
- 1Check the light and viewing system, perform hand hygiene and choose a clean, correctly fitted speculum; avoid transferring infection between ears.
- 2Examine the surrounding tissues, then inspect the canal and different membrane regions with gentle changes of angle rather than deep insertion.
- 3Withdraw if the patient becomes distressed or develops undue discomfort, bleeding or new symptoms, and decide whether assistance or specialist assessment is required.
02Abnormal or incomplete viewMatch the next step to the limitationWax, discharge, canal narrowing or an abnormal membrane prevents a confident conclusion.+
- 1Record which structures and membrane regions were actually visible and describe the obstructing material or lesion.
- 2Choose a trained ear-care or ENT service when removal or microscopy is needed; check perforation, surgery and other contraindications before considering irrigation or drops.
- 3Refer unexplained persistent discharge, a suspicious pocket or polyp, and persistent adult middle-ear effusion for diagnostic assessment rather than repeatedly treating an uncertain image.
03Adult effusion and atypical symptomsInvestigate beyond a presumed blocked earAn adult has middle-ear fluid or hearing symptoms without a satisfactory transient explanation.+
- 1Establish whether a respiratory infection accounts for the effusion and whether it persists after that illness has resolved.
- 2Consider ENT referral for persistent or unexplained adult effusion; NICE specifically advises considering a suspected-cancer pathway in adults of Chinese or south-east Asian family origin when hearing loss and effusion are not associated with an upper respiratory tract infection.
- 3Arrange hearing assessment and examine for relevant nasal, neck or neurological symptoms, while explaining that referral investigates a possible cause and does not establish a cancer diagnosis.
05Risks, monitoring and follow-upComplications, safety checks and further assessment.
- Record the side, relevant symptoms, canal condition, membrane integrity and contour, plus any region that remained unseen.
- After treatment of an obstructing or inflammatory problem, reassess both the physical findings and the hearing complaint; an improved canal does not establish recovered cochlear function.
- Ensure a specific review or referral plan exists for persistent effusion, recurrent discharge, a perforation or a retraction whose full depth could not be examined.
- Give clear instructions to seek earlier help for sudden hearing deterioration, facial weakness, severe dizziness, increasing pain, postauricular swelling or systemic illness.
- If a video image is stored, label the correct ear and date and follow the service's consent and information-governance arrangements; an image should supplement an adequate clinical record.
06Special situationsVariants, exceptions and circumstances that change the usual approach.
The whole membrane may need several views
A single central view can leave the attic or anterior margin unseen. Small changes in the otoscope angle or the patient's head position can improve access, but repeated painful probing is not a substitute for suitable equipment or specialist help.
An opaque patch is not always active disease
Old scarring or tympanosclerosis can alter the drum after infection or grommet placement. Distinguish a stable plaque within the membrane from retained debris in a pocket or a new mass behind it, using the history and the surrounding contour rather than colour alone.
Pain and hearing severity need their own assessment
Marked otalgia may arise outside the ear when otoscopy is normal, and major hearing loss can occur with no visible lesion. Consider the wider head and neck or neurological examination according to symptoms rather than forcing the complaint to fit a minor incidental finding.
Communication continues throughout the procedure
Removing a hearing aid and turning away can make instructions inaccessible. Agree a stop signal in advance, explain changes before moving the instrument, and restore communication support promptly after the examination. Assess understanding of the resulting plan, not just agreement to the procedure.
Avoid assumptions about an operated ear
Mastoid cavities, grafts and reconstructed membranes can require different cleaning and surveillance. Ask who normally follows the ear, recover the operative history where possible, and seek advice before introducing fluid or performing a procedure unfamiliar to the examiner.
07Common pitfallsFrequent interpretation and management errors.
- 01
Documenting a normal tympanic membrane when wax allowed only a small part to be seen.
- 02
Diagnosing middle-ear infection from redness alone without considering contour, symptoms and alternative causes.
- 03
Treating an attic crust or persistent polyp as ordinary wax without arranging assessment of the underlying structure.
- 04
Using a visually normal ear examination to delay referral for an abrupt unexplained hearing deficit.
- 05
Persisting with uncomfortable instrumentation because the examination has not yet produced a complete view.