What causes ear wax build-up?

Ear wax (cerumen) builds up when the ear's natural self-cleaning process is disrupted. Common triggers are using cotton buds, wearing hearing aids or earphones, having a narrow ear canal, or simply producing more wax. Left alone, wax can build up into a blockage. Age can make wax drier and more likely to become impacted, and some people are naturally more prone to it.

What are the common causes of ear wax build-up in the ear canal?

• Cotton bud use. Pushes wax further into the canal instead of removing it, often making build-up worse.
• Hearing aids and earphones. Can block the ear canal's natural outward migration of wax and trap it in place.
• A narrow ear canal, or hairy ear canals. Some people's ear canal shape naturally makes wax more likely to become trapped, causing a blockage.
• Overproduction of wax. Producing more wax than average is a natural, individual variation with no underlying problem.
• Age. Wax tends to become drier and harder with age, making it more prone to impaction.

Is ear wax build-up a sign of poor hygiene?

No. Ear wax is a normal, protective substance produced by every ear, and build-up is usually about how wax moves (or fails to move) out of the canal, not about cleanliness. Frequent home cleaning attempts, particularly with cotton buds, often make build-up worse rather than better.

How do you know if you have an ear wax blockage?

Common signs include a feeling of fullness, muffled hearing, mild discomfort, or a change noticed after using earphones or hearing aids. An otoscope check by a professional confirms whether wax is present and how significant the build-up is.

Can diet, cotton buds or lifestyle affect ear wax?

There is no strong evidence that diet significantly changes how much wax you produce. The main factors are genetic, anatomical (canal shape) and behavioural, such as cotton bud use or wearing in-ear devices regularly, rather than anything you eat or drink.

What should you do about ear wax build-up?

For mild build-up, softening drops used for a few days are often enough. For persistent or significant build-up, or if you are prone to it, professional removal such as micro-suction is the safest option. See our guide on how to clean your ears safely at home for step-by-step guidance.

For more information, visit Healthdirect (healthdirect.gov.au) (opens in a new tab).

Sources: Healthdirect; Mayo Clinic. Information current July 2026 and general in nature.