Impacted cerumen is earwax that has accumulated in the ear canal and can no longer clear itself out naturally. It affects roughly 19% of Americans aged 12 and older, and that number climbs to about 32% in adults over 70. While earwax is completely normal and even beneficial, impaction occurs when wax builds up faster than the ear can expel it, sometimes blocking the canal entirely or pressing against the eardrum.
Why Earwax Exists in the First Place
Earwax serves a real purpose. It moisturizes the skin lining the ear canal, repels water, and acts as a barrier against bacteria, fungi, insects, and debris. It even has natural germ-killing properties. Under normal circumstances, the jaw movements you make while chewing and talking slowly push old wax outward, where it dries up and falls out on its own. Most people never need to think about it.
Impaction happens when that self-cleaning conveyor belt breaks down. The wax stays put, hardens, and accumulates until it partially or fully blocks the canal.
Common Causes and Risk Factors
The single biggest culprit is putting things in your ears. Cotton swabs, earbuds, earplugs, and hearing aids all push wax deeper into the canal and can actually speed up wax production. Hearing aids are a double problem: they stimulate the glands that make wax while also physically blocking its outward migration. People who wear hearing aids are advised to have their ear canals checked every three to six months.
Anatomy plays a role too. Some people are born with narrower ear canals, and others develop bony growths inside the canal over time (common in cold-water swimmers). Both situations make it harder for wax to exit naturally. Skin conditions like eczema and seborrheic dermatitis also increase the frequency of impaction, likely because they change the texture and composition of the wax itself.
Older adults are disproportionately affected. Earwax tends to become drier and harder with age, and it doesn’t migrate as efficiently.
What Impacted Cerumen Feels Like
Many people with earwax buildup have no symptoms at all, and in those cases, no treatment is needed. When the blockage does cause problems, the most common signs include:
- A feeling of fullness or pressure in the affected ear
- Muffled hearing or noticeable hearing loss on one side
- Ringing or buzzing sounds (tinnitus)
- Earache or pain
- Dizziness
- Itchiness deep in the ear canal
- Odor or discharge from the ear
The hearing loss caused by impaction is conductive, meaning sound waves are physically blocked from reaching the eardrum. It reverses completely once the wax is removed. Dizziness occurs because the ear canal sits close to the structures responsible for balance, and pressure from a large plug of wax can disturb them.
How It’s Diagnosed
A clinician diagnoses impacted cerumen simply by looking into the ear canal with an otoscope. If wax is blocking the view of the eardrum, or if the patient has symptoms like hearing loss, pain, or dizziness, that’s enough to confirm impaction and recommend removal. Sometimes the blockage is so dense or deep that a microscope is needed to see past it.
One important point: if wax is visible but causing no symptoms and isn’t preventing a proper ear exam, it generally doesn’t need to be treated. Earwax is protective, and removing it unnecessarily strips the canal of its natural defense layer.
How Impacted Wax Is Removed
There are three main approaches, and the right one depends on the situation.
Softening Drops
The first step is often using ear drops for up to five days to soften the wax before removal. Options include oil-based drops, sodium bicarbonate solutions, and other over-the-counter cerumen softeners. In a comparative study of softening agents, sodium bicarbonate performed well, second only to a prescription-grade solvent. Even plain saline can help, though it’s the least effective option. Sometimes softening alone is enough for the wax to work its way out naturally.
Irrigation
Irrigation involves flushing the ear canal with warm water to wash the softened wax out. It’s effective and widely available, but it’s not safe for everyone. If you have a history of a ruptured eardrum, ear tubes, previous ear surgery, or signs of an ear infection, irrigation should be avoided. It’s also not recommended if you’ve had radiation therapy to the head or neck area. Your clinician will check for these before proceeding.
Manual Removal and Microsuction
For people who can’t safely undergo irrigation, manual removal is the alternative. A clinician uses a small curved instrument called a curette to scoop wax out, or a thin vacuum nozzle (microsuction) to suction it free. Microsuction is particularly useful for people with perforated eardrums, a history of ear surgery, or an active outer ear infection. During the procedure, a doctor looks into the canal with a microscope or tiny camera and uses gentle suction to dislodge the wax, then removes it with the vacuum or fine forceps.
Most people describe these procedures as mildly uncomfortable but not painful. The relief in hearing is often immediate and dramatic.
What Not to Do
Cotton swabs are the worst offender. They compact wax deeper into the canal, irritate the delicate skin lining, and can even puncture the eardrum. Ear candles, which involve placing a hollow cone in the ear and lighting the other end, have been studied and found to be ineffective. They also carry a risk of burns and dripping hot wax into the canal.
Any object inserted into the ear canal, whether it’s a bobby pin, a key, or a rolled-up tissue, risks pushing wax further in, scratching the canal wall, and introducing bacteria that can cause infection.
Preventing Recurrence
For most people, prevention simply means leaving your ears alone. The canal cleans itself. Resist the urge to “clean” with cotton swabs after showering.
If you’re prone to recurrent impaction because of narrow canals, hearing aid use, or naturally heavy wax production, periodic professional cleanings are the most reliable prevention. Hearing aid users should also follow the manufacturer’s cleaning instructions to keep wax from building up on the device itself, which can push it back into the ear. Using softening drops periodically between professional visits can help keep wax from hardening in place, though there’s no single product that outperforms the rest for routine maintenance.