Earwax buildup happens when your ear canal’s natural self-cleaning system gets disrupted, either by something you’re doing (like using cotton swabs or wearing earbuds for hours) or by factors outside your control (like aging, narrow ear canals, or genetics). About 5% of healthy adults experience wax blockages, but that number jumps dramatically with age, affecting up to 57% of nursing home residents.
How Your Ears Make and Remove Wax
Two types of glands inside your ear canal produce earwax. Sebaceous glands, attached to tiny hair follicles, secrete an oily substance called sebum that keeps your ear skin lubricated and prevents drying. Ceruminous glands, which are modified sweat glands, add antimicrobial proteins that fight off germs. Together, these secretions mix with dead skin cells, hair, and fatty compounds like cholesterol and keratin to form what you recognize as earwax.
Your ear canal has a built-in conveyor belt. The skin lining the canal slowly migrates outward at roughly 0.15 millimeters per day, carrying old wax, trapped dust, and dead cells toward the opening of your ear. Chewing and jaw movement help nudge things along. Under normal circumstances, wax works its way out on its own, dries up, and flakes away without you ever noticing. Problems start when something interferes with this process.
Cotton Swabs and Other Objects
The most common cause of wax buildup is, ironically, trying to clean your ears. Inserting a cotton swab acts like a plunger, pushing wax deeper into the canal with each stroke. Once wax gets shoved past the point where the skin’s outward migration can move it, it has no way to get swept out naturally. Over time, repeated swabbing compresses wax against the eardrum, forming a hard plug.
Bobby pins, pen caps, twisted napkin corners, and even fingertips can do the same thing. Any object that enters the canal risks disrupting the natural outward flow and packing wax tighter instead of removing it.
Earbuds and Hearing Aids
Anything that sits inside your ear canal for extended periods can block the self-cleaning process. If you wear earbuds all day, wax that would normally migrate out gets trapped behind the device. The physical presence of the earbud can also irritate the skin and cartilage of the outer ear canal, potentially stimulating more wax production.
That said, occasional or intermittent use typically isn’t a problem. The risk rises with people who keep earbuds in for many hours daily. Over-the-ear headphones are a better option if you’re prone to buildup, since they don’t sit inside the canal at all. Hearing aid users face a similar challenge, and regular cleaning appointments help prevent blockages from becoming a recurring issue.
Anatomy That Traps Wax
Some people are simply built for wax problems. Ear canal stenosis, a condition where the canal is unusually narrow, makes it harder for wax to travel outward. Most people with this condition are born with it, though repeated ear infections can cause scarring that narrows the canal over time.
Bony growths called exostoses can also obstruct the canal. These noncancerous lumps develop from repeated exposure to cold water, which is why they’re sometimes called “surfer’s ear.” As they grow, they create ledges and narrow spots where wax gets stuck. Left unaddressed, these growths can lead to recurrent infections or hearing loss. People with very curved or unusually shaped ear canals can experience similar trapping even without growths or stenosis.
Why Wax Gets Worse With Age
Aging changes both the quality and quantity of earwax in ways that make buildup more likely. The tiny hair-like structures (cilia) that help move wax outward lose function over time, slowing the ear’s self-cleaning conveyor belt. Meanwhile, the glands that produce wax shift their output: older adults tend to produce drier, harder wax that doesn’t flow as easily toward the ear opening. The ear canal skin itself can become dry and itchy, which often prompts people to scratch or insert objects, compounding the problem.
This combination of slower clearance and stickier wax explains why impaction rates climb so steeply in older populations. The 57% prevalence rate among nursing home residents isn’t just about aging glands. It also reflects reduced ability to manage ear hygiene independently and less jaw movement from decreased chewing.
Other Contributing Factors
Genetics play a real role. Earwax comes in two types, wet and dry, determined by a single gene. People of East Asian descent are more likely to have dry, flaky wax, while people of European or African descent typically produce wet, sticky wax. Wet wax is more prone to buildup because it clings to canal walls rather than flaking out.
Overproduction is another factor. Some people’s glands simply make more wax than the canal can clear. Skin conditions like eczema or psoriasis inside the ear canal can increase shedding of dead skin cells, adding bulk to the wax mixture. Frequent ear infections cause swelling and inflammation that temporarily narrow the canal and slow wax movement.
How Buildup Affects Hearing
A fully blocked ear canal can reduce your hearing by 5 to 35 decibels, with an average loss of about 14 decibels. To put that in perspective, 14 decibels is roughly the difference between a quiet room and someone whispering nearby. It’s enough to make conversations sound muffled or make you turn up the TV volume noticeably. The hearing loss isn’t limited to specific pitches; it can dampen sounds across all frequencies.
The good news is that this type of hearing loss reverses completely once the wax is removed. Studies show improvements of up to 35 decibels after clearing a total blockage. Beyond muffled hearing, impacted wax can cause a feeling of fullness or pressure in the ear, ringing (tinnitus), earache, dizziness, and occasionally coughing, since the ear canal shares a nerve pathway with the throat.
Preventing Buildup Before It Starts
The simplest prevention strategy is to stop putting things in your ears. Let the canal’s natural migration do its job, and only wipe away wax that has already made it to the outer ear with a damp cloth. If you wear earbuds or hearing aids daily, give your ears regular breaks so trapped wax has time to work its way out.
Over-the-counter softening drops (mineral oil, baby oil, or glycerin) can help if you notice early signs of buildup like muffled hearing or a plugged feeling. A few drops in the affected ear, used for a few days, soften hardened wax enough for the canal to clear it naturally. People who are prone to recurring impaction, especially older adults or those with narrow canals, benefit from periodic professional cleanings every 6 to 12 months to stay ahead of the problem.