Swimmer's Ear Prevention Guide for Triathletes: How to Avoid Otitis Externa

You've perfected your swim stroke, dialed in your nutrition, and built a solid training plan. But there's one small detail that could undo weeks of hard work in a matter of days: your ears.

For triathletes, swim training is all about endurance, efficiency, and speed. Yet one small detail often gets overlooked — your ears. An outer ear infection — commonly known as swimmer's ear — can quickly derail your training, bringing pain, irritation, and forced time out of the water.

The good news? With a few simple habits, ear care can become just another non-negotiable part of your performance routine, right alongside your post-run stretch or race-day nutrition plan.

What Is Swimmer's Ear (Otitis Externa)?

Swimmer's ear, medically known as otitis externa, is an infection of the outer ear canal — not the middle ear infection most people associate with childhood illness. The word "otitis" simply means inflammation of the ear, and in this case, the inflammation targets the external canal that runs from your outer ear to your eardrum.

The root cause is straightforward: water gets trapped in the ear canal after swimming, showering, or sweating. That trapped moisture creates a warm, humid environment — essentially a perfect incubator for bacterial growth. Over time, even your ear's natural defence mechanism (earwax, or cerumen) breaks down under repeated moisture exposure, leaving the delicate skin of the canal vulnerable to infection.

The key distinction worth understanding: swimmer's ear affects the outer canal and is caused by trapped water and bacteria. A typical middle ear infection, by contrast, usually follows a cold or respiratory illness. Different causes, different symptoms, different treatments — which is why recognising which one you have matters.

Why Triathletes Are Especially Vulnerable

If you're regularly in the pool or open water, you're statistically more susceptible than the average person. The maths are simple: more water exposure equals more opportunity for moisture to become trapped.

But it's not just swimming that puts triathletes at risk. Several other factors compound the problem:

• Sweat from intense training sessions can contribute to moisture buildup in the ear canal, even on dry-land workouts
• Earbuds worn during training trap moisture and reduce airflow to the canal
• Scratching itchy or blocked ears — a common response to early irritation — damages the delicate skin lining the canal, making infection more likely
• Earwax buildup, often accelerated by frequent water exposure, can trap bacteria rather than repel it
• Multiple daily water exposure points: pool session in the morning, open-water swim in the afternoon, post-workout shower — each is another opportunity for moisture to linger

The cumulative effect of training three to five swim sessions per week, combined with long-course training blocks, puts triathletes in a higher-risk category than recreational swimmers. And unlike a casual pool-goer, a triathlete with an ear infection doesn't just miss a swim — they risk disrupting an entire interconnected training plan.

Recognising the Warning Signs Early

The faster you identify swimmer's ear, the faster you can act — and the less training you'll lose. Early symptoms are easy to dismiss as minor irritation, which is exactly why they go untreated until a full infection sets in.

Watch for these warning signs:

• Itching or irritation inside the ear canal (often the first indicator)
• A feeling of fullness or pressure, as if water is still trapped
• Mild discomfort when touching or pulling the outer ear
• Redness and swelling inside the canal
• Pain and tenderness that worsens with jaw movement or pressure on the tragus (the small flap at the front of your ear)
• Watery or pus-like discharge
• Temporary hearing loss or muffled sound

The progression from mild irritation to a painful, full-blown infection can happen quickly — particularly if you continue training in the water. If symptoms persist beyond 24–48 hours, intensify, or are accompanied by discharge or hearing changes, consult a pharmacist or healthcare provider promptly.

Early detection means earlier treatment, faster recovery, and less disruption to your training block.

Prevention Strategies That Actually Work

The most effective prevention plan is the one you'll actually stick to. These strategies are simple, inexpensive, and easy to integrate into routines you already have.

1. Create a Physical Barrier

Swim caps and earplugs are your first line of defence. A well-fitted swim cap reduces direct water entry into the ear canal, while properly inserted earplugs create a seal that stops water reaching the canal entirely.

A few earplug considerations:

• Foam or silicone earplugs are affordable and widely available (roughly £5–£15)
• Custom-moulded earplugs (£50–£150) offer a superior seal and are well worth the investment for athletes swimming four or more times per week
• Insertion technique matters — an improperly seated earplug may feel secure but provide minimal protection. Practice at home before your next pool session

2. Master the Post-Swim Drying Routine

This five-minute protocol after every session is arguably the single most impactful habit you can build:

1. Exit the water and remove your cap and earplugs
2. Tilt your head side to side — hold each position for 30 seconds to allow gravity to drain trapped water
3. Gently pat the outer ear dry with a clean towel (never insert the towel into the canal)
4. Shower and dry your ears thoroughly afterwards
5. Allow ears to air out before inserting earbuds or headphones

Think of this like brushing your teeth: non-negotiable, quick, and preventative. The few minutes you invest here are buying you weeks of uninterrupted training.

3. Manage Earwax Smartly

Earwax gets a bad reputation, but it's actually your ear's built-in protective barrier — it has antibacterial properties and helps prevent moisture from penetrating the canal lining. The goal isn't to eliminate it; it's to keep it healthy.

What to do:

• Let your ears self-clean naturally where possible
• Consult a pharmacist or GP if you notice excessive buildup

What not to do:

• Never use cotton buds — they push wax deeper into the canal rather than removing it, and can damage the delicate skin lining
• Avoid inserting fingers or any other objects into the ear canal

4. Rethink Your Earbud Habits

Many triathletes run and cycle with earbuds, then head straight to the pool. Earbuds reduce airflow in the canal and can trap residual moisture — particularly problematic if ears haven't fully dried between sessions. Consider giving ears a full drying period before inserting earbuds post-swim, or switching to bone-conduction headphones for training, which sit outside the ear canal entirely.

5. Your Prevention Checklist

Use this before and after every water session:

• ☐ Earplugs inserted correctly and sealed
• ☐ Swim cap secured
• ☐ Post-swim: tilt head side to side to drain water
• ☐ Pat outer ear dry with clean towel
• ☐ Shower and dry ears thoroughly
• ☐ Avoid earbuds for at least 30–60 minutes after drying
• ☐ Monitor for any early itching or irritation

Managing Symptoms When They Appear

If swimmer's ear develops despite your best prevention efforts, act quickly. The earlier you respond, the shorter your time out of the water.

Immediate Steps

• Stop swimming — this is non-negotiable. Continuing to train in the water will worsen the infection and extend your recovery time significantly.
• Over-the-counter pain relief such as paracetamol or ibuprofen can help manage discomfort while the infection clears. Follow package dosage instructions carefully.

Keep the Ear Dry

During recovery, protecting the affected ear from additional moisture is critical. Place a clean cotton ball lightly coated in petroleum jelly at the ear opening before showering. Avoid submerging the ear in any water — no pool, no open water, no prolonged rain exposure. Skip earbuds and earplugs entirely until the infection fully clears.

What Not to Do

• Do not insert cotton buds — they push bacteria deeper and damage healing skin
• Do not use earplugs during infection (they trap moisture and bacteria)
• Do not scratch or pick at the ear, however tempting
• Do not attempt home remedies (including hydrogen peroxide) without guidance from a pharmacist or healthcare provider

Treatment Options

For symptom relief and targeted treatment, your pharmacist can recommend suitable options. EarCalm Spray is available without prescription from pharmacies and is used for the treatment of minor infections of the outer ear canal. It contains acetic acid, an antibacterial ingredient that targets the source of infection and offers relief from symptoms such as pain and inflammation. Always read the label and follow pharmacist guidance.

If over-the-counter treatment doesn't provide improvement within 24–48 hours, symptoms worsen, discharge develops, or hearing is affected, see a healthcare provider. Prescription antibiotic ear drops or topical corticosteroids may be required for more advanced infections.

With appropriate treatment and complete rest from water exposure, most cases of swimmer's ear resolve within 7–14 days. Returning to the water prematurely significantly increases the risk of reinfection.

Building Ear Care Into Your Training Rhythm

The most effective prevention isn't a one-off effort — it's a system you build into your training life. Here's how to make it stick.

Habit Stacking

Pair ear care with habits you already have. After every swim, your sequence might look like this:

Pool exit → Remove cap and plugs → Head tilts → Pat dry → Shower → Dry ears → Gear check

After two or three weeks, this becomes automatic — as intuitive as reaching for your goggles before getting in the water.

Seasonal Adjustments

• Peak pool training season: Increase vigilance with earplugs and post-swim drying. Higher frequency means higher risk.
• Open-water season: Double up — cap and earplugs, plus rigorous post-swim drying. Open water carries additional bacterial exposure compared to treated pool water.
• Off-season: Maintain the habits. An ear infection during recovery weeks is just as disruptive as one during peak training.

Gear Investment: The ROI Argument

Item	Approximate Cost
Foam/silicone earplugs	£5–£15
Quality swim cap	£10–£40
Custom-moulded earplugs	£50–£150
EarCalm Spray (OTC)	£5–£8

Compare that investment to two weeks out of the water during a key training block, potential prescription costs, and the time lost rebuilding swim fitness. The economics of prevention are obvious.

Frequently Asked Questions

Q: Can I swim with earplugs in open water?
Yes — many triathletes use earplugs in both pool and open-water settings. Ensure they're correctly inserted and that your swim cap holds them securely in place. Custom-moulded options are particularly reliable for open-water use.

Q: How long until I can swim again after a swimmer's ear infection?
Typically 7–14 days, but this varies with severity. Return to water only after symptoms have fully resolved and, ideally, with guidance from your pharmacist or GP. Returning too early risks reinfection and a longer overall recovery.

Q: Are custom earplugs worth the cost?
For triathletes swimming four or more times weekly, absolutely. A better seal means more reliable protection — and one avoided infection more than pays for the investment.

Q: Is swimmer's ear contagious?
No. Swimmer's ear is caused by trapped water creating bacterial growth in your own ear canal. It cannot be transmitted from person to person.

Q: What's the difference between swimmer's ear and a regular ear infection?
Swimmer's ear (otitis externa) affects the outer ear canal and is caused by trapped water and bacteria. A standard middle ear infection typically follows a respiratory illness and affects the space behind the eardrum. The symptoms, causes, and treatments differ — which is why it's important to identify which you have before seeking treatment.

Source: 220 Triathlon — Don't Let Swimmer's Ear Derail Your Training