You climb out of the pool, the day goes fine, and a day or two later your ear starts to itch, then ache, then feels full and tender when you tug on it. That’s the classic arc of swimmer’s ear — and the good news is it’s usually preventable, and when it does happen it’s very treatable. This guide walks you through what swimmer’s ear actually is, how to tell it apart from a regular ear infection, how to dry your ears properly, and the warning signs that mean you should stop self-treating and call a doctor.
Quick answer
- What it is: Swimmer’s ear is otitis externa — inflammation and infection of the outer ear canal, the tube between the opening of your ear and the eardrum.
- Main cause: Water trapped in the canal softens the skin and lets bacteria grow. Scratching or cotton-swab use makes it worse by breaking the skin.
- Classic sign: Pain when you pull on your earlobe or push the little flap (tragus) in front of the canal.
- Prevention: Dry your ears after swimming (tilt, tug, towel), skip cotton swabs, and consider acidifying or drying drops — but not if you have ear tubes or a perforated eardrum.
- See a doctor if: the pain is severe, you have discharge, fever, hearing loss, or the swelling spreads beyond the ear.
What swimmer’s ear actually is
Swimmer’s ear is the everyday name for acute otitis externa, a diffuse inflammation of the external ear canal. Most cases come from a bacterial infection, with Pseudomonas aeruginosa and Staphylococcus aureus being the usual culprits.1 It’s common in children and young adults, and the hallmark exam finding is tenderness when the tragus or pinna (the outer ear) is moved.1
Here’s the key distinction people get wrong: swimmer’s ear is not the same as a middle-ear infection.
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Explore new cuisines| Swimmer’s ear (otitis externa) | Middle-ear infection (otitis media) | |
|---|---|---|
| Location | Outer ear canal | Behind the eardrum |
| Trigger | Trapped water, trauma to the canal | Usually follows a cold/congestion |
| Telltale sign | Pain when you tug the earlobe | Pain without tugging; often after a cold |
| Who | Swimmers, all ages | Mostly young kids |
| Discharge | From the canal, can be common | Only if the eardrum bursts |
Otitis externa typically follows swimming or minor trauma from cleaning the ear with cotton swabs or other objects.2
Why water causes it
Your ear canal has a few built-in defenses: a slightly acidic surface, a thin layer of protective earwax (cerumen), and skin that wants to stay dry. Sit in water long enough and a few things happen at once. The water washes away protective wax, the trapped moisture raises the pH and softens the skin, and that warm, damp, less-acidic environment is exactly what bacteria like. Add a small scratch from a fingernail or a cotton swab and you’ve given bacteria a way in.
That’s why the two big prevention principles are simple: keep the canal dry, and don’t injure it. Keys to prevention are avoiding injury to the ear canal and keeping it free of water.1
Symptoms to watch for
Swimmer’s ear usually comes on fast — over hours to a day or two. Typical signs:
- Itching in the ear canal (often the first symptom)
- Pain (otalgia), especially when you tug the earlobe or chew
- Redness and swelling of the canal
- A feeling of fullness or blockage
- Drainage — clear at first, then possibly thicker or pus-like
- Muffled hearing if the canal swells enough to narrow
Mild cases feel like an itchy, slightly sore ear. More advanced cases get genuinely painful, and the canal can swell almost shut.
How to dry your ears the right way
After every swim or shower, get the water out:
- Tilt and tug. Tip your head to one side, then gently pull the earlobe in different directions to straighten the canal and let water run out.
- Towel the outside. Dry the outer ear with a corner of a towel. Don’t push anything into the canal.
- Use low, cool air. A hair dryer on the lowest, coolest setting held a foot away can evaporate leftover moisture.
- Skip the cotton swabs. They push wax deeper, scratch the canal, and remove the protective layer you actually want.
Optional drying drops
If you’re prone to swimmer’s ear, an over-the-counter acidifying or drying drop after swimming can help. These usually contain acetic acid (like a diluted vinegar solution) or isopropyl alcohol, which lower the canal’s pH and help it dry out. Acetic acid 2% is one of the recognized topical options for the outer ear.1
Important safety limit: do not use alcohol or acidic drops — or any home drop — if you have ear tubes, a known or suspected perforated (ruptured) eardrum, or active drainage. Drops that are fine for an intact canal can cause pain or harm if they reach the middle ear. If you’re unsure whether your eardrum is intact, ask a clinician first.
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Do and don’t
Do
- Dry your ears after swimming and bathing
- Tilt your head and hop to drain trapped water
- Leave normal earwax alone — it’s protective
- Consider swim earplugs or a swim cap over the ears if you get recurrent infections
- Treat the skin around your ears gently, the same way you’d protect a healthy skin barrier anywhere else
Don’t
- Stick cotton swabs, fingers, hairpins, or keys into the canal
- Swim in water that looks dirty or has posted contamination warnings — recreational water can carry germs that cause ear, skin, and stomach illness3
- Use drops if you might have a perforated eardrum or tubes
- Ignore worsening pain for days hoping it clears on its own
Treatment: what usually happens
For a typical, uncomplicated case, the mainstays of therapy are pain relief and topical (ear-drop) antibiotics. Topical options include acetic acid, aminoglycosides, polymyxin B, and quinolones, with or without a corticosteroid to calm inflammation; there’s no good evidence that one preparation is clearly superior, so the choice comes down to factors like cost, whether the eardrum is intact, and how easy it is to stick with.1 A typical course of topical treatment runs about seven to 10 days.1
Oral antibiotics are usually not needed and are reserved for cases where the infection spreads beyond the canal, or for higher-risk people such as those who are immunocompromised or have diabetes.1 Management really centers on clearing the infection, controlling pain, and preventing it from coming back.2
A practical note: if a clinician prescribes drops, ask them to show you how to get the drops fully into the canal — lying on your side for a few minutes afterward helps the medicine reach where it needs to go.
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When to see a doctor
Most swimmer’s ear should be evaluated by a clinician to get the right drops, but some signs mean you shouldn’t wait:
- Severe ear pain or pain that’s getting worse
- Discharge (especially thick, pus-like, or foul-smelling)
- Fever
- Hearing loss or a canal that’s swollen nearly shut
- Swelling, redness, or pain spreading to the outer ear or the skin around it (a sign infection is moving beyond the canal)
- Diabetes or a weakened immune system with any ear infection — these raise the risk of a serious form of the infection that needs prompt care
- Symptoms that don’t improve after a couple of days of treatment
People who are immunosuppressed are more likely to develop a severe, invasive form called necrotizing otitis externa and should be watched carefully.2 When in doubt, get it looked at — it’s a quick visit and the drops work well.
Bottom line
Swimmer’s ear is an outer-ear-canal infection, distinct from a middle-ear infection, and it comes from trapped water plus minor trauma to the canal. Prevent it by drying your ears after swimming (tilt, tug, towel, cool air), leaving cotton swabs out of the equation, and — if you’re prone to it and your eardrum is intact — using acidifying or alcohol drying drops. Treatment is mostly topical antibiotics and pain control over about a week. Watch for the red flags: severe pain, discharge, fever, hearing loss, or spreading swelling, and get medical care if any show up. While you’re thinking about water and your skin, see how pools affect you in chlorine and skin, how to bounce back in post-beach skincare, and how to stay safe in open water in ocean swimming safety.
Jackson EA, Geer K. Acute Otitis Externa: Rapid Evidence Review. Am Fam Physician. 2023;107(2):145-151. PubMed ↩︎ ↩︎ ↩︎ ↩︎ ↩︎ ↩︎ ↩︎
Ellis J, De La Lis A, Rosen E, Simpson MTW, Beyea MM, Beyea JA. Approach to otitis externa. Can Fam Physician. 2024;70(10):617-623. PubMed | DOI ↩︎ ↩︎ ↩︎
Centers for Disease Control and Prevention. Swimming and Your Health. CDC Healthy Swimming. Link ↩︎
