Accumulation of cerumen producing symptoms or obstructing the canal/TM examination.
Also known as: cerumen impaction, earwax impaction, impacted cerumen
Overview
Accumulation of cerumen that (a) causes symptoms (hearing loss, fullness, pain, tinnitus, itch, cough), (b) prevents needed examination of the ear, or (c) both. Asymptomatic cerumen that does not obstruct evaluation is not 'impaction' and does not require removal.
Epidemiology
Affects ~1 in 10 children, 1 in 20 adults, and >1 in 3 elderly or cognitively impaired patients. Among the most common reasons for primary-care ENT visits.
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Question 1EENTEasy
A 72-year-old man presents with gradual right-sided hearing loss and a sensation of ear fullness that worsened after showering this morning. He also reports mild itching and an occasional dry cough when cleaning his ear with cotton swabs. He denies fever, ear pain, or drainage. On otoscopy, a firm yellow-brown plug fills the external auditory canal and obscures the tympanic membrane. There is no tenderness on tragal pressure and no canal erythema. Tuning fork testing shows a conductive pattern on the affected side. Which of the following is the most likely diagnosis?
ACholesteatoma of the middle ear cleft
BOtomycosis of the external ear canal
CAcute otitis externa of ear canal
DCerumen impaction of the ear canal
Reveal answer & full explanation
Correct answer: D — Cerumen impaction of the ear canal
ACholesteatoma of the middle ear cleft
BOtomycosis of the external ear canal
CAcute otitis externa of ear canal
DCerumen impaction of the ear canal✓
Why Cerumen impaction of the ear canal is correct
A firm yellow-brown plug filling the external auditory canal and obscuring the tympanic membrane is the classic otoscopic finding of impacted cerumen.
Gradual conductive hearing loss that worsens after water exposure (cerumen swells and fully occludes the canal), ear fullness, itch, and a reflex cough (Arnold nerve, the auricular branch of CN X) are all hallmark symptoms.
Cotton-swab use in an older adult (drier cerumen, less elastic canal skin) is the most common precipitant; the absence of pain, erythema, and drainage points away from an infectious cause.
Why the others are wrong
Acute otitis externa is a diffuse external canal infection causing pain on tragal pressure, an erythematous edematous canal, and weepy debris rather than a discrete firm plug; this patient has no tenderness or erythema.
Otomycosis is a fungal canal infection producing intense pruritus with visible hyphae or black/white spores, not a homogeneous cerumen plug.
Cholesteatoma is a keratin accumulation in the attic or a retraction pocket presenting as white debris, often with foul otorrhea; it is not a yellow-brown canal plug and would warrant CT and ENT referral.
Question 2EENTEasy
A 58-year-old man presents with 1 week of muffled hearing and a sensation of fullness in the right ear, which worsened after he showered this morning. He admits to routinely cleaning his ears with cotton-tipped applicators. He has no ear pain, drainage, fever, or prior ear surgery, and takes no anticoagulants. On otoscopy, the right external auditory canal is completely occluded by a firm yellow-brown plug; the tympanic membrane cannot be visualized. The canal skin is non-tender and not erythematous. Which of the following is the most appropriate initial management?
AClotrimazole otic suspension
BCiprofloxacin otic suspension
CAcetic acid otic suspension
DCarbamide peroxide otic drops
Reveal answer & full explanation
Correct answer: D — Carbamide peroxide otic drops
AClotrimazole otic suspension
BCiprofloxacin otic suspension
CAcetic acid otic suspension
DCarbamide peroxide otic drops✓
Why Carbamide peroxide otic drops is correct
This is uncomplicated cerumen impaction: a firm yellow-brown plug occluding the canal with no pain, erythema, drainage, perforation, tube, or prior surgery.
A ceruminolytic agent (carbamide peroxide 6.5%, mineral oil, hydrogen peroxide 3%, or docusate) is guideline-defined first-line; it softens the plug and may clear it or facilitate later irrigation or curettage.
The AAO-HNS Cerumen Impaction guideline endorses ceruminolytics, irrigation, or manual removal as appropriate first-line options; a ceruminolytic is the least invasive starting point in a patient with no contraindications.
Why the others are wrong
Ciprofloxacin otic suspension — a topical fluoroquinolone for otitis externa; there is no tragal pain, canal erythema, or otorrhea to suggest infection, and it does not dissolve cerumen.
Clotrimazole otic suspension — an antifungal for otomycosis, which presents with pruritus and visible hyphae or black/white spores, not a firm cerumen plug.
Acetic acid otic suspension — an acidifying drop used for otitis externa or canal acidification; it treats infection or alters canal pH and is not a ceruminolytic for a mechanical obstruction.
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Advanced age (drier cerumen, less elastic canal skin)
Use of cotton-tipped applicators (pushes cerumen deeper)
Hearing aid or earplug use
Narrow or hairy canals (more common in men)
Down syndrome, intellectual disability
Prior radiation to ear
Cerumen-producing genotype (wet vs dry cerumen is genetically determined)
Pathophysiology
Cerumen is a mixture of ceruminous gland secretion, sebum, exfoliated keratinocytes, and dust. It is normally extruded laterally via epithelial migration and jaw movement. Mechanical disruption (cotton swabs, devices) or impaired migration (age, dermatologic disease) leads to accumulation, hardening, and impaction.
Clinical presentation
Symptoms
Gradual or sudden hearing loss (often after water exposure swells cerumen)
Sensation of ear fullness or pressure
Tinnitus
Itch, mild discomfort or pain
Reflex cough (Arnold nerve — auricular branch of CN X)
Dizziness (uncommon)
Signs / physical exam
Direct visualization of cerumen filling part or all of the EAC
Inability to visualize the tympanic membrane
Conductive hearing loss on bedside tuning fork tests if canal completely occluded
Differential diagnosis
Otitis externa — Pain on tragal pressure, erythematous canal, debris but not the firm yellow-brown plug of cerumen; topical otic drops
Foreign body — History or visualization of non-cerumen object; common in children
Keratosis obturans — Painful accumulation of desquamated keratin in canal, often bilateral; canal widening; may erode bone
Cholesteatoma — White debris in attic or retraction pocket, often with foul otorrhea; CT and ENT referral
Cerumen removal methods with indications and contraindications.
Treatment
First-line
Ceruminolytic agent — carbamide peroxide 6.5% drops, mineral oil, hydrogen peroxide 3%, or docusate sodium — 3-5 drops BID for 3-5 days
Irrigation with body-temperature water using a syringe or commercial irrigator — direct jet toward posterior canal wall (NOT directly at TM); contraindicated if TM perforation, tube, or h/o ear surgery
Manual removal with curette, hook, or suction under direct visualization — preferred for hard plugs or when irrigation contraindicated
Avoid cotton-tipped applicators and ear candles (no evidence of benefit; risk burns and TM injury)
Second-line / adjunct
ENT referral for: failed primary attempts, suspected TM perforation, prior ear surgery, anticoagulation with high bleeding risk, only-hearing ear, uncooperative patient (microscopy with suction)
Patient education to prevent recurrence: do not insert objects in ear; periodic ceruminolytic in high-risk patients
Complications
TM perforation (irrigation, instrumentation)
External canal abrasion or bleeding
Acute otitis externa following manipulation
Tinnitus or transient vertigo from cold/warm water (caloric stimulation)
Persistent hearing loss if undiagnosed underlying pathology (cholesteatoma, tumor)
PANCE pearls
Use body-temperature water for irrigation — cold or hot water induces caloric vertigo and nystagmus.
Never irrigate if TM perforation, tympanostomy tube, prior tympanoplasty, or h/o radical mastoidectomy is known or suspected.
Patients on anticoagulants are at higher risk of canal bleeding — prefer ceruminolytic and gentle technique.
After removal, ALWAYS visualize the TM — cerumen impaction can mask AOM, perforation, cholesteatoma, or canal tumor.
Routine ear 'cleaning' with cotton swabs causes most impactions — the ear is self-cleaning.
References
AAO-HNS 2017 — Schwartz SR et al. Clinical Practice Guideline (Update): Earwax (Cerumen Impaction). Otolaryngol Head Neck Surg 2017;156(1S):S1-S29
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