Swimmer's Ear: Causes, Treatment, and How to Prevent It
Swimmer's Ear: Causes, Treatment, and How to Prevent It Meta Painful, itchy ear after swimming? An ENT explains swimmer's ear - its causes, treatment, and how to keep it from returning. Keywords: swimmer's ear, otitis externa, ear canal infection, swimmer's ear treatment, ear pain swimming
Every summer, like clockwork, my Brooklyn office fills with the same story: a few days at the pool or beach, then an ear that starts itching, feels full, and quickly becomes so tender that even touching it hurts. That's swimmer's ear - and despite the name, you don't need to be a swimmer to get it. It's one of the most common ear infections we treat, it's very painful, and the good news is that it responds quickly to the right treatment and is largely preventable once you know how it starts.
What Swimmer's Ear Is
Swimmer's ear - medically known as otitis externa - is an infection of the ear canal, the inch-long passage that runs from the outer ear to the eardrum. This makes it fundamentally different from the "middle ear infections" common in children, which occur behind the eardrum and usually follow colds.
The distinction matters because the two are treated differently. A middle ear infection often requires oral antibiotics; swimmer's ear is a skin infection of the canal itself and is treated primarily with medicated drops applied directly where the infection lives.
The ear canal normally protects itself well. Its skin is coated with a thin layer of slightly acidic earwax that repels water and discourages bacteria. Swimmer's ear happens when that defense breaks down - usually because the canal stays wet, the protective wax is stripped away, or the skin gets scratched - and bacteria (most often Pseudomonas or Staphylococcus, both common in water) move in and multiply.
How You Get It
Trapped moisture is the classic trigger. When water lingers in the canal after swimming or even showering, it softens the skin and washes away the acidic wax layer, creating the warm, damp environment bacteria love. That's why cases spike in summer and in humid weather.
But water is only half the story. The other major cause is damage to the canal skin:
Cotton swabs and ear scratching. Digging in the ear strips protective wax and leaves micro-scratches - open doors for bacteria. Many "swimmer's ear" cases in non-swimmers start exactly this way.
Earbuds, earplugs, and hearing aids. Worn for long hours, they trap moisture and can chafe the canal.
Skin conditions. Eczema, psoriasis, or seborrheic dermatitis in the canal cracks the skin barrier.
Contaminated water. Lakes, hot tubs with poor maintenance, and under-chlorinated pools carry higher bacterial loads than well-kept pools.
People with narrow ear canals, heavy wax production, or diabetes are more susceptible - and for those with diabetes or weakened immune systems, ear canal infections deserve extra respect, as they can occasionally spread aggressively (a condition called malignant otitis externa that requires urgent treatment).
Symptoms to Recognize
Swimmer's ear tends to follow a recognizable progression:
Early: Itching inside the canal, mild discomfort, and a feeling of fullness or water trapped in the ear
Developing: Increasing pain that is the hallmark of this infection - pain that worsens sharply when you tug the outer ear or press the small flap (tragus) in front of the canal. This tenderness to touch distinguishes swimmer's ear from a middle ear infection, which doesn't hurt more when the ear is pulled.
Progressing: Drainage of clear fluid that may turn cloudy or yellowish, muffled hearing as the canal swells shut, and visible redness
Advanced: Severe pain radiating to the face, neck, or side of the head, swelling of the outer ear or nearby lymph nodes, and fever
Don't wait for the advanced stage. Swimmer's ear caught early is quickly and easily treated; a canal swollen completely shut is far more painful and takes longer to resolve.
Treatment
The cornerstone of swimmer's ear treatment is prescription ear drops - typically an antibiotic, often combined with a steroid to calm swelling and pain. Because the medication is applied directly into the infected canal, it works fast: most patients feel dramatically better within 48-72 hours, though it's important to finish the full course (usually 7-10 days) to prevent a rebound.
A few points that make treatment succeed:
Proper drop technique. Lie on your side, fill the canal, then gently press the tragus a few times to work the drops in, and stay put for 3-5 minutes. Warm the bottle in your hands first - cold drops can cause brief dizziness.
Canal cleaning. If the canal is full of debris and drainage, drops can't reach the infected skin. In the office, we gently clean the canal under a microscope - one of the most useful things an ENT visit adds, and a key reason stubborn cases finally clear.
A wick for swollen canals. If the canal has swollen nearly shut, we place a tiny sponge wick that carries drops deep into the canal until the swelling subsides.
Pain control. Over-the-counter ibuprofen or acetaminophen handles most discomfort; the pain improves rapidly once drops take effect.
Keep the ear dry throughout treatment - no swimming, and keep shower water out with a petroleum-jelly-coated cotton ball placed loosely at the canal opening.
Oral antibiotics are reserved for infections spreading beyond the canal, fever, or higher-risk patients - most cases don't need them. If symptoms aren't clearly improving within 2-3 days of drops, or you develop fever or spreading pain and swelling, be seen promptly. And because fungal infections and other conditions can mimic swimmer's ear, an ear that keeps "relapsing" deserves a look under the microscope rather than another round of the same drops.
Prevention Tips
Once you've had swimmer's ear, you won't want it again. Prevention comes down to keeping the canal dry, intact, and left alone:
Dry your ears after every swim and shower. Tilt your head to each side and let water drain, then dry the outer ear with a towel. A hair dryer on the lowest, coolest setting held about a foot away works well for water that lingers.
Use drying drops after swimming if you're prone to infections: over-the-counter versions, or a homemade mix of equal parts white vinegar and rubbing alcohol (a few drops per ear) restores acidity and evaporates moisture. Skip this if you have ear tubes, a perforated eardrum, or any ear surgery history.
Try swim earplugs or a swim cap if you're in the water frequently - especially helpful for kids in summer swim programs.
Never insert cotton swabs or anything else into the canal. Your wax is protective; leave it.
Give earbuds a rest - clean them regularly and avoid marathon sessions, particularly in hot weather.
Be choosy about water. Well-maintained pools over questionable hot tubs and stagnant water.
Manage skin conditions of the ear canal with your doctor, since cracked skin invites infection.
For frequent swimmers and anyone who gets recurrent episodes, a quick ENT visit can identify the underlying reason - narrow canals, wax buildup, or a skin condition - and set up a simple routine that keeps the problem from coming back season after season.
Swimmer's ear is painful, but it's one of the most satisfying conditions we treat: fast relief, full recovery, and genuinely effective prevention. If your ear is aching after time in the water - or hurts when you tug on it - don't tough it out.
Dr. Raj Bhayani, MD, is a board-certified ENT specialist serving Brooklyn, NY, at the New York Institute of Otolaryngology & Aesthetic Surgery. The practice provides advanced care for Chronic Sinusitis, Nasal Obstruction, Allergies, Sleep Disorders, Balloon Sinuplasty, Pediatric ENT, and Audiology - with same-week appointments and minimally invasive surgical options.
