Earwax & Swimmers: Water, Exostosis, and Ear Health
Swimming changes the chemistry of your ear canal, accelerates wax build-up, and — over years of cold-water exposure — can cause permanent bony growths. Here is what every swimmer in Devon needs to know.
Regular swimmers develop clinically significant earwax impaction within a single season — compared to 1 in 10 non-swimmers of the same age
Journal of Laryngology & Otology, 2018
Of exostosis (bony canal growths) cases occur in people with 5+ years of cold-water swimming or surfing history
British Journal of Sports Medicine, 2021
Water temperature threshold below which exostosis risk rises sharply — relevant to open-water swimmers in Devon year-round
Clinical Otolaryngology, 2019
A microsuction appointment at Earwax Removal Devon — safe, dry, no water, suitable even after recent swimming
Earwax Removal Devon
How Water Changes the Ear Canal Environment
The ear canal is a self-regulating environment. Cerumen maintains an acidic pH, provides a physical barrier against water and debris, and migrates outward continuously through epithelial movement. Swimming disrupts all three of these functions simultaneously. The result is not simply a wet ear — it is a canal whose chemistry, structure, and self-cleaning capacity are all temporarily impaired.
Devon's coastline makes open-water swimming and surfing year-round activities for many residents. The Atlantic waters off North Devon average 8–12°C for much of the year — well below the 15°C threshold at which cold-water exostosis risk begins to accumulate. Pool swimmers face different but equally significant challenges: chlorinated water degrades the cerumen lipid barrier more aggressively than fresh water, and the warm, humid pool environment promotes bacterial growth in any water trapped behind a wax plug.
"Exostosis of the external auditory canal is significantly associated with cold-water exposure. The prevalence in surfers with more than five years of cold-water activity is approximately 73%, compared with 5% in age-matched non-surfers."
— British Journal of Sports Medicine, 2021
Understanding the four specific mechanisms by which water affects the canal explains why swimmers develop wax problems at higher rates than non-swimmers — and why the solutions are different from those that work for the general population.
Why Swimming Accelerates Earwax Build-Up
Each mechanism operates independently, but they interact and compound one another in regular swimmers. A patient with all four active simultaneously — a competitive open-water swimmer with pre-existing wax, for example — faces a significantly elevated impaction risk.
Water softens and swells the wax plug
Cerumen is hydrophilic — it absorbs water readily. When water enters the ear canal during swimming, it is absorbed into the wax plug, causing it to swell. A plug that was previously loose enough to migrate outward can expand to fill the canal completely, producing sudden, dramatic hearing loss immediately after leaving the pool or sea. This swelling effect is temporary in most cases: the wax dries and contracts as the canal warms, and hearing partially returns. However, repeated cycles of swelling and contraction compact the plug progressively, making it harder and more adherent over time.
Maceration of the canal skin
Prolonged water exposure softens and breaks down the protective epithelial layer of the ear canal — a process called maceration. The canal's natural acidic environment (pH 6.0–6.5), maintained partly by cerumen, is disrupted by repeated water exposure. The skin becomes waterlogged, loses its integrity, and is far more susceptible to bacterial and fungal colonisation. Macerated canal skin also migrates outward more slowly, reducing the ear's self-cleaning efficiency. Swimmers who develop recurrent otitis externa (swimmer's ear infection) often have maceration as the underlying predisposing factor.
Trapped water behind a wax plug
When a partial wax plug is present, water entering the canal can become trapped between the plug and the eardrum. The water cannot drain because the wax acts as a valve, and the warm, moist space behind the plug becomes an ideal environment for bacterial growth — particularly Pseudomonas aeruginosa and Staphylococcus aureus, the two organisms most commonly responsible for otitis externa. This mechanism explains why swimmers with pre-existing wax build-up develop ear infections at significantly higher rates than those with clear canals.
Disruption of the cerumen lipid barrier
The lipid-rich outer layer of cerumen forms a hydrophobic barrier that repels water and prevents it from reaching the canal skin directly. Chlorinated pool water and salt water both degrade this lipid barrier more aggressively than fresh water. Chlorine strips the fatty acids from the cerumen surface, reducing its water-repelling properties. Salt water draws moisture out of the canal skin through osmosis, drying and cracking the epithelium. Both effects accelerate the breakdown of the canal's natural defences, leaving the skin vulnerable between swimming sessions.
What Is Exostosis and Who Gets It?
Exostosis of the external auditory canal — colloquially known as surfer's ear — is the growth of smooth, rounded bony protrusions from the walls of the ear canal. The condition develops in response to repeated exposure to cold water and cold air. The periosteum (bone-covering membrane) lining the canal responds to thermal stress by laying down new bone, gradually narrowing the canal diameter over years of exposure.
The condition is not exclusive to surfers. Open-water swimmers, kayakers, divers, windsurfers, and anyone who regularly exposes their ears to cold water and wind faces the same risk. In Devon, where the Atlantic provides year-round cold-water access and a strong surfing and wild swimming culture, exostosis is a clinically relevant finding in a significant proportion of active outdoor water users.
Exostosis is distinct from osteoma — a single, pedunculated (stalk-mounted) bony growth that is not related to cold-water exposure and is far less common. Exostosis produces multiple, broad-based protrusions, typically on the anterior and posterior canal walls, and progresses in three clinical stages.
The Three Stages of Exostosis
| Stage | Canal Occlusion | Typical Symptoms | Management |
|---|---|---|---|
| Stage 1 Small, smooth bony protrusions on the posterior and anterior canal walls. Asymptomatic in most patients. Detectable only on otoscopic examination. | < 33% | None, or mild water trapping after swimming | Monitoring; improved ear protection; regular wax removal to prevent compaction in the narrowed canal |
| Stage 2 Multiple or larger protrusions causing moderate canal narrowing. Water trapping becomes consistent. Wax impaction more frequent due to reduced canal diameter. | 33–66% | Recurrent water trapping, muffled hearing after swimming, increased wax impaction frequency | Regular professional wax removal (every 3–6 months); custom-moulded ear plugs; ENT referral if progressing |
| Stage 3 Severe narrowing or near-complete occlusion of the canal. Significant hearing loss, chronic infections, and persistent wax impaction. Surgical intervention typically indicated. | > 66% | Significant conductive hearing loss, chronic otitis externa, persistent impaction, tinnitus | ENT surgical referral (canalplasty); post-operative ear protection essential; regular wax removal after surgery |
Earwax management is more important — not less — with exostosis
A narrowed canal traps wax more readily than a normal canal, and the wax that accumulates is harder to remove because there is less space to manoeuvre. Patients with Stage 2 exostosis typically need professional wax removal every three to six months to prevent impaction from compounding the canal narrowing. Microsuction — performed under direct vision — is the only safe technique in a significantly narrowed canal; irrigation is contraindicated.
Prevention: What Works and What Does Not
Prevention is significantly more effective than treatment for both wax impaction and exostosis. The measures below are ranked by evidence quality. Those marked as ineffective are included because they remain widely recommended online and in pharmacies despite the clinical evidence against them.
Custom-moulded swim plugs
EffectiveThe most effective barrier against water entry. Moulded to the exact shape of your canal, they seal completely without the pressure discomfort of foam plugs. Recommended for regular swimmers and all cold-water activities.
Standard foam or silicone plugs
EffectiveAdequate for occasional swimmers. Less effective than custom moulds — particularly in the outer canal — but significantly better than no protection. Replace regularly as they degrade with use.
Tilting and pulling the ear after swimming
EffectiveTilting the head to each side and gently pulling the ear upward and backward opens the canal and allows trapped water to drain by gravity. More effective when combined with a single hop on each foot. Takes 30–60 seconds and removes most residual water.
Acetic acid (white vinegar) drops
EffectiveA 2% acetic acid solution restores the canal's natural acidic pH after swimming, inhibiting bacterial and fungal growth. Available as Earol Swim or EarCalm spray. Use after every swim session, not as a treatment for active infection.
Cotton buds
AvoidCotton buds compact wax deeper into the canal, remove the protective cerumen layer, and cause micro-abrasions that increase infection risk. They are the single most common cause of iatrogenic (self-inflicted) ear canal damage in adults.
Ear candles
AvoidEar candles produce no measurable negative pressure and do not remove wax. Clinical studies have found candle wax deposited on eardrums following their use. They carry a genuine burn risk to the face, ear canal, and eardrum.
Hydrogen peroxide drops (undiluted)
AvoidUndiluted hydrogen peroxide (3%+) damages the canal epithelium and can cause pain and temporary hearing changes. Diluted preparations (0.5%) are sometimes used clinically, but over-the-counter undiluted products should be avoided.
Devon's cold Atlantic waters and year-round exostosis risk
North Devon's coastline — from Croyde and Saunton to Westward Ho! and Bude — attracts surfers, open-water swimmers, and kayakers throughout the year. Sea temperatures rarely exceed 17°C even in August, and drop to 7–9°C between December and March. Year-round cold-water activity without ear protection accumulates exostosis risk faster than seasonal swimming alone. If you surf or swim in Devon's open water more than twice a week, an annual ear examination is a worthwhile investment in your long-term hearing health.
Ear Symptoms After Swimming: What to Do
Most ear symptoms after swimming are caused by water trapping or wax swelling and resolve with professional removal. A small number of symptoms indicate infection or structural damage and require GP or ENT assessment first.
Severe ear pain with fever after swimming
UrgentGP or urgent care — likely acute otitis externa requiring antibiotic ear drops
Discharge from the ear (pus or blood)
UrgentGP assessment before any earwax removal attempt
Sudden complete hearing loss after swimming
UrgentSame-day assessment — may indicate full wax occlusion or eardrum perforation
Persistent dizziness or vertigo after water entry
UrgentGP or ENT assessment — cold water caloric effect or inner ear involvement
Muffled hearing that clears within an hour of leaving the water
Likely wax swelling — book a wax removal appointment if it recurs
Itching inside the ear after swimming
Acetic acid drops after each swim; book wax removal if wax is present
Questions About Earwax and Swimming
QWhy does my hearing go muffled immediately after swimming?
Water absorbed into a wax plug causes it to swell rapidly, filling the canal and blocking sound transmission. The effect is usually temporary — as the canal warms and the water evaporates, the wax contracts and hearing partially returns. If this happens consistently, a wax removal appointment will resolve the underlying plug before it compacts further.
QWhat is exostosis and how do I know if I have it?
Exostosis is the growth of smooth, rounded bony protrusions from the walls of the ear canal in response to repeated cold-water exposure. The condition develops gradually over years and is often discovered incidentally during an ear examination. Symptoms — water trapping, recurrent wax impaction, hearing changes — typically appear only at Stage 2 or above. If you have surfed or swum in cold water for five or more years, an otoscopic examination is worthwhile.
QCan I swim with earwax impaction?
Swimming with a wax impaction significantly increases the risk of otitis externa (ear infection), because water trapped behind the plug creates ideal conditions for bacterial growth. It also worsens the impaction itself through the swelling mechanism. Getting the wax removed before the swimming season — or before a holiday involving water activities — is the most practical approach.
QAre ear plugs safe to use if I have exostosis?
Custom-moulded plugs are safe and strongly recommended for patients with exostosis. Standard foam plugs can be difficult to insert and remove in a narrowed canal and may cause discomfort. An audiologist or ear care specialist can take impressions for custom plugs that fit the exact geometry of your canal, including around bony protrusions.
QHow often should a regular swimmer have their ears checked?
Twice a year is a sensible baseline for adults who swim more than three times per week. Competitive swimmers, surfers, and open-water swimmers in cold conditions benefit from quarterly checks, particularly if they have a history of impaction or exostosis. A maintenance programme removes wax before it reaches the level of impaction.
QDoes microsuction work if my ears are wet from swimming?
Microsuction is performed under direct otoscopic vision and does not introduce water into the canal, making it safe to perform regardless of recent water exposure. If water is present in the canal, it is removed first. The procedure is equally effective whether the canal is dry or has recently been exposed to water.
Other factors that increase earwax production
Water exposure is one of several factors that accelerate wax build-up. Psychological stress raises cortisol, which directly stimulates the sebaceous glands in the ear canal. Age-related changes in cerumen composition make wax harder and less mobile from the fifth decade onwards. Understanding all the factors at play helps you manage your ear health more effectively.
Related Reading
Microsuction
The safest earwax removal method — no water, direct vision, suitable for narrowed canals and exostosis.
Earwax & Flying
How altitude and pressure changes interact with earwax — relevant for surfers and divers who also fly.
How Often to Have Wax Removed
Patient-type intervals and NICE NG207 guidance — including recommended frequencies for regular swimmers.
Written & Reviewed By
Eleni Kiromitis
Ear Care Specialist — Earwax Removal Devon
Eleni is a qualified ear care practitioner based in South Molton, Devon. She holds a Certificate in Ear Care (Level 6) and is trained in both microsuction and water irrigation. She practises in line with NICE guideline NG207 on earwax management and carries full professional indemnity insurance. All clinical content on this page has been written and reviewed by Eleni to ensure accuracy.
Keep Swimming. Keep Hearing Clearly.
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