Earwax builds up when your ear canal produces wax faster than the body can push it out, or when something blocks the natural exit path. Your ear canal is designed to clean itself, but several common habits, anatomical quirks, and age-related changes can disrupt that process and cause wax to accumulate.
How Your Ear Canal Makes Wax
Earwax is produced by two types of glands in the outer third of your ear canal: modified sweat glands and oil-producing sebaceous glands. Their secretions mix with dead skin cells that shed from the canal walls. The result is cerumen, a waxy substance made up of roughly 60% keratin (a structural protein), 12 to 20% fatty acids, and smaller amounts of cholesterol and other lipids. This blend acts as a lubricant, traps dust and debris, and creates a slightly acidic environment that discourages bacterial and fungal growth.
One detail most people don’t realize: wax is only produced in the outer portion of the ear canal, not deep inside near the eardrum. When wax ends up deep in the canal, something has pushed it there.
The Self-Cleaning Conveyor Belt
Your ear canal has a built-in cleaning mechanism that works like a slow conveyor belt. The skin lining the eardrum and canal wall constantly grows outward, migrating at about 0.1 millimeters per day, roughly the speed your fingernails grow. This migration carries old wax, trapped dust, and dead skin cells toward the ear opening, where the material dries up, flakes off, or washes away during bathing.
This process relies on two cellular mechanisms working together. New skin cells generated near the eardrum push older cells outward passively, while individual cells also move on their own using tiny contractile proteins in their structure. The combined effect keeps the canal clear without any help from you. In a healthy ear, the average migration rate is about 110 micrometers per day along the canal wall. When disease or surgery disrupts this migration, the rate can drop dramatically, sometimes to as little as 20 micrometers per day, which sets the stage for chronic buildup.
What Disrupts the Process
The most common cause of wax buildup is putting objects in the ear canal, especially cotton swabs. Each time a swab goes in, it pushes a portion of wax deeper than where it was produced, past the point where the self-cleaning mechanism can reach it effectively. Over time, repeated swabbing compresses wax against the eardrum, slowly constructing a wall that blocks the canal. This can cause temporary hearing loss, a plugged sensation, ringing, and even dizziness.
Earbuds and hearing aids create a different but related problem. They sit inside the canal and physically block the outward migration of wax. If you wear headphones for many hours every day, wax accumulates because the devices obstruct the cleaning process. They can also irritate the skin and cartilage of the outer canal, which may stimulate additional wax production.
Anatomy and Bone Growths
Some people are simply built for wax problems. Narrow or unusually curved ear canals make it harder for wax to travel outward. Bony overgrowths called exostoses, sometimes known as surfer’s ear because cold water and wind exposure trigger them, develop slowly inside the canal and create physical barriers. These growths trap wax and water, leading to recurring buildup and a higher risk of outer ear infections.
Ear canal stenosis, a narrowing caused by scarring or chronic inflammation, produces the same effect. The narrower the passage, the less room wax has to move and the more likely it is to compact.
Why Wax Builds Up More With Age
Earwax impaction affects about 19% of the general population, but that number jumps to roughly 30% in older adults. Several age-related changes explain the increase. The glands in the ear canal tend to produce drier, harder wax over time, which doesn’t migrate as easily. The skin of the canal loses some elasticity, slowing the conveyor belt effect. Hair growth in the ear canal, more common in older men, can trap wax before it reaches the opening. And many older adults wear hearing aids, which block the exit path for hours each day.
Genetics and Wax Type
Your genes determine whether you produce wet or dry earwax, and this affects how prone you are to buildup. A single variation in a gene called ABCC11 controls wax type. The wet form, which is honey-brown and sticky, is more common in people of European and African descent. The dry form, which is gray and flaky, is predominant in East Asian populations, where the dry-wax gene variant reaches over 95% frequency. Dry wax generally migrates out of the canal more easily, while wet wax is stickier and more likely to accumulate, especially in combination with other risk factors like narrow canals or frequent earbud use.
Signs of Wax Impaction
Gradual hearing loss in one ear is the most common symptom people notice, and it often develops so slowly that they attribute it to aging or background noise. Other signs include a feeling of fullness or pressure, earache, ringing or buzzing (tinnitus), and itching. In some cases, severe impaction causes dizziness because the packed wax presses against the eardrum and affects balance signaling. These symptoms typically resolve quickly once the wax is removed.
Safe Ways to Manage Buildup
The simplest approach is to do nothing for the inner canal and only clean what’s visible at the ear opening. A damp washcloth over your finger after a shower handles that job. If you’re prone to buildup, over-the-counter ear drops (often mineral oil, saline, or hydrogen peroxide-based solutions) can soften hardened wax and help it migrate out naturally over a few days.
For impacted wax that’s causing symptoms, clinical guidelines recommend three main approaches: softening drops, gentle irrigation with warm water, or manual removal by a trained clinician using specialized instruments. The right choice depends on your ear’s anatomy and health. People with a history of eardrum perforation, ear surgery, or conditions like diabetes that increase infection risk need to be evaluated before any removal attempt, because irrigation in those situations can cause serious complications.
If you wear hearing aids, having your ears checked for wax buildup at routine visits helps prevent the gradual blockage that accumulates around the devices. Cleaning the hearing aids themselves also matters, since wax deposits on the device can push material back into the canal each time you insert them.