Hearing Health Guide
Definition
Cerumen impaction is the buildup of cerumen (earwax) in the external ear canal to a degree that it occludes the canal and causes symptoms including muffled hearing, a sensation of fullness, tinnitus, or discomfort, or that prevents audiological testing or otoscopic examination. The AAO-HNS estimates that cerumen impaction affects approximately 6% of the general population and is one of the most common reasons patients are referred to ear, nose, and throat specialists.
Cerumen is a naturally occurring substance produced by glands in the outer third of the ear canal. It serves protective functions: trapping dust and debris, providing a mild antimicrobial environment, and lubricating the canal. Under normal circumstances, the ear canal is self-cleaning. The skin of the canal migrates outward slowly, carrying cerumen with it.
Impaction occurs when this natural migration is disrupted or when cerumen production exceeds the self-cleaning rate. Risk factors include: use of cotton swabs (which push wax deeper), hearing aid and earbud use (which obstruct outward migration), narrow or tortuous ear canals, excessive hair in the canal, and conditions that produce drier, harder cerumen.
Cerumen impaction can cause conductive hearing loss (typically mild to moderate), tinnitus, aural fullness, itching, and occasionally a reflex cough. The hearing loss is reversible once the wax is removed.
Cerumen impaction is an important consideration before audiological testing: a blocked canal will falsely elevate air conduction thresholds. Audiologists inspect the ear canal before testing and reschedule or refer for wax management if significant impaction is present.
Three methods are commonly used: irrigation (flushing with warm water), manual removal (using a curette or suction under otoscopic view), and cerumenolytic agents (softening drops used before irrigation). Audiologists, primary care physicians, and ENTs all perform cerumen management.
Cotton swab use for ear cleaning is contraindicated. It typically compacts wax rather than removing it and can cause ear canal trauma or eardrum perforation. If you suspect impaction, have it assessed and removed professionally rather than attempting self-removal.
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