Keeping your ears dry and leaving your earwax alone are the two most effective ways to prevent swimmer’s ear. The condition is a bacterial infection of the ear canal, most commonly triggered by water that stays trapped after swimming, showering, or any prolonged moisture exposure. Prevention comes down to protecting your ear canal’s natural defenses and removing water before bacteria get a foothold.
Why Water Causes Ear Infections
Your ear canal has a surprisingly effective self-defense system. It’s lined with a thin layer of earwax that is naturally water-repellent, slightly acidic, and inhospitable to bacteria. When everything is working, bacteria that live on the skin surface stay harmless.
Problems start when water sits in the canal long enough to soften the skin and wash away that protective wax layer. Once the wax barrier is gone, the leftover skin debris absorbs water like a sponge, creating a warm, moist environment where bacteria thrive. The canal’s natural acidity drops, and two bacteria in particular, Pseudomonas aeruginosa and Staphylococcus aureus, take over. That’s swimmer’s ear.
This is why the infection is so strongly tied to swimming. It’s the single most common risk factor. But any repeated water exposure, including long showers, humid climates, or heavy sweating under headphones, can set the same process in motion.
Dry Your Ears After Every Swim
The simplest prevention step is getting water out of your ears as soon as possible. Tilt your head to each side after swimming or showering and let gravity pull the water out. Gently pulling on your earlobe while tilting can help open the canal and release trapped water. A hair dryer set to low heat, held about a foot from your ear, can evaporate lingering moisture without any contact with the canal itself.
If you swim frequently, earplugs or a fitted swim cap that covers the ears can reduce how much water enters the canal in the first place. This is especially useful for kids, whose smaller ear canals trap water more easily and are more vulnerable to injury.
Use Preventative Drops After Swimming
A homemade solution of equal parts white vinegar and rubbing alcohol works well as a preventative drop after water exposure. The rubbing alcohol helps evaporate residual water, while the vinegar restores the ear canal’s acidic environment and discourages bacterial and fungal growth. Tilt your head, place a few drops in one ear, let it sit for a moment, then tilt to drain. Repeat on the other side.
One important caution: never use any ear drops if you think you might have a ruptured eardrum. If the eardrum has a hole in it, liquid can pass through into the middle or inner ear and cause serious complications. The same applies if you have ear tubes. If you’re unsure about the condition of your eardrums, skip the drops and stick to the drying methods above.
Stop Cleaning Inside Your Ears
Cotton swabs are one of the biggest risk factors for swimmer’s ear, and this catches most people off guard. Sticking a swab into your ear canal does two things that make infection more likely. First, it scrapes the delicate skin lining the canal, creating tiny breaks where bacteria can enter. Second, it pushes wax and debris deeper into the canal, where they form a plug that traps water behind it.
Research on children with resistant ear canal infections found that repeated use of cotton buds was the primary cause. Adults aren’t immune to this either. Using swabs, bobby pins, keys, or anything else to scratch an itch or remove wax strips away the very layer of cerumen your body produces to keep infections out. The ear canal is self-cleaning. Wax naturally migrates outward on its own. Wiping the outer ear with a towel after a shower is all the maintenance it needs.
Know What Higher-Risk Situations Look Like
Some people are more vulnerable to swimmer’s ear and need to be more diligent about prevention. If you swim daily, surf, dive, or spend long periods in the water, your ear canal gets less time to recover between exposures. People who use hearing aids or earbuds for extended periods also trap moisture and heat against the canal skin.
Skin conditions like eczema or psoriasis that affect the ear canal can compromise the skin barrier on their own, making any additional moisture exposure riskier. Narrow or unusually shaped ear canals trap water more readily, which is partly why children get swimmer’s ear so frequently.
The type of water matters less than you might think. Chlorinated pools, lakes, oceans, and even bath water can all introduce enough moisture to trigger infection. The dominant bacteria involved, Pseudomonas, is everywhere in aquatic environments. The real variable isn’t the water source but how long the water stays in your ear afterward.
Recognize It Early If Prevention Fails
Swimmer’s ear gives clear early signals before it becomes severe. The most reliable early sign is pain when you tug on your outer ear or press on the small flap of cartilage in front of your ear canal (called the tragus). This distinguishes it from a middle ear infection, which doesn’t produce pain with external pressure. Other early signs include itchiness inside the canal, mild redness, and a small amount of clear drainage.
If you notice these symptoms, stop swimming and keep the ear dry. The infection typically responds well to treatment when caught early but can become significantly more painful and harder to resolve if water exposure continues. Redness, swelling, and discharge that worsens over a day or two means the infection is progressing and needs medical attention.