Cerumen Impaction

Cerumen is produced by the ceruminous and sebaceous glands of the outer third of the ear canal. Under normal circumstances it migrates laterally by jaw movement and skin epithelial migration and requires no intervention. In a subset of patients — those with narrow or tortuous canals, excessive canal hair, hearing aid use, cotton bud use, or overactive ceruminous glands — this self-clearing mechanism fails and wax accumulates to the point of obstruction.

Cerumen impaction is the commonest reversible cause of conductive hearing loss in adults. It accounts for a substantial proportion of ENT and primary care ear-related consultations and is a frequent cause of inappropriate audiology referral when the wax goes undetected before hearing testing.

Who is at higher risk

Certain patient groups are more likely to develop symptomatic cerumen impaction and warrant proactive assessment:

• Hearing aid users — the aid occludes the canal, preventing normal lateral migration; the AAO-HNS guideline specifically recommends checking for impaction during every health care encounter in this group
• Older adults — cerumen becomes drier and less mobile with age; canal hair also increases
• Cotton bud users — cotton buds compress and impact wax deeper rather than removing it
• Narrow or stenotic canals — anatomical variants, exostoses, and previous canal surgery all reduce clearance
• Children — smaller canal diameter; also frequently unable to express symptoms

Removal method selection

The method chosen should be matched to the patient’s ear status, wax consistency, and clinical setting.

Patient / Ear Status	Preferred Method
Intact drum, soft wax	Irrigation or microsuction
Intact drum, hard wax	Cerumenolytic drops 3–5 days, then microsuction or irrigation
Perforated drum	Microsuction only — irrigation is contraindicated
Post-operative ear	Microsuction only
Unknown perforation status	Treat as perforated; microsuction or instrumentation
Narrow or tortuous canal	Direct instrumentation under visualisation (Jobson Horne, crocodile forceps)
Hearing aid user	Microsuction or instrumentation; irrigation risks damaging hearing aid components
Child or uncooperative patient	Direct visualisation + crocodile forceps; consider GA if severe or non-compliant

Instruments used for cerumen removal

Microsuction — a fine suction cannula under direct otoscopic or microscopic visualisation removes soft and semi-solid wax without introducing liquid into the canal. It is the safest method in ears of uncertain perforation status and provides simultaneous visualisation and clearance.

Jobson Horne probe — a right-angled probe used to dislodge and hook out wax under direct vision, particularly hard plugs that resist suction. Requires careful technique to avoid canal skin trauma.

Micro crocodile ear forceps — serrated jaw forceps for gripping and extracting firm wax plugs, soft foreign bodies, or wax adherent to canal walls. Provides positive purchase on material that a smooth suction tip cannot lift.

Video otoscope — enables real-time visualisation during instrumentation and allows the patient to observe the procedure. Particularly useful in primary care and audiology settings without an operating microscope.

What to assess at the end of treatment

Per the AAO-HNS clinical practice guideline, patients should be assessed at the conclusion of in-office treatment to confirm resolution of the impaction. If the canal is clear but symptoms persist, alternative diagnoses (sensorineural hearing loss, tympanic membrane pathology, Eustachian tube dysfunction) should be considered. If the impaction is not fully cleared, additional treatment or referral to a specialist with appropriate equipment should follow.

Frequently Asked Questions

What causes ears to become blocked with wax? The ear normally clears itself via a process of epithelial migration — skin cells move laterally from the drum surface outward, carrying cerumen with them. In some patients this process is inefficient, or wax production exceeds clearance. Cotton bud use, canal anatomy, hearing aid wear, and age-related changes to wax consistency are common contributing factors.

Is microsuction better than syringing? Both methods are effective for cerumen removal in ears with an intact tympanic membrane. Microsuction offers better visualisation, can be used safely in perforated ears, and does not introduce water into the canal. Irrigation (syringing) is faster and effective for soft wax but is contraindicated when perforation status is unknown or when the drum is known to be perforated. The AAO-HNS 2017 guideline lists both as appropriate options depending on clinical context.

Can patients soften wax at home before a clinic appointment? Yes. Cerumenolytic softening drops — olive oil, sodium bicarbonate solution, or commercial preparations — applied for 3–5 days before the appointment soften hard impactions and improve the ease of removal. They do not remove impacted wax on their own in most cases.

Is ear candling effective? No. The AAO-HNS clinical practice guideline explicitly recommends against ear candling for treating or preventing cerumen impaction. It is not effective at removing wax and carries a risk of thermal injury to the canal skin and tympanic membrane.

When should cerumen impaction be referred to ENT? Referral is appropriate when: initial removal is unsuccessful; the canal cannot be fully assessed; the patient has modifying factors (non-intact drum, exostoses, stenosis, prior ear surgery, immunocompromise); or symptoms persist after confirmed clearance. ENT can access the canal under an operating microscope with a full instrument set for difficult cases.