Preventing swimmer’s ear comes down to keeping your ear canals dry and protecting their natural defenses. Your ears already have a built-in system to fight infection: a thin layer of earwax that repels water, traps debris, and maintains an acidic environment (pH 4.5 to 5.5) that bacteria struggle to survive in. Most cases of swimmer’s ear happen when water sits in the canal long enough to break down that barrier, letting bacteria multiply in the warm, moist space. Everything you do to prevent it either speeds up drying, preserves that acidic shield, or avoids damaging it in the first place.
Dry Your Ears After Every Swim
The single most effective habit is getting water out of your ears promptly. 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 straighten the ear canal and release trapped water. A hair dryer on its lowest heat and speed setting, held about a foot from your ear, can evaporate lingering moisture without irritating the skin.
The goal is to restore the dry, slightly acidic environment as quickly as possible. Water that pools in the canal for hours dilutes your earwax’s protective acidity and softens the skin lining, creating exactly the conditions bacteria need to take hold.
Homemade and Store-Bought Drying Drops
A simple preventive ear drop can help evaporate trapped water and restore acidity. The standard home recipe, recommended by Stanford Health Care among other institutions, is a 50/50 mix of white vinegar and rubbing alcohol (isopropyl alcohol). The alcohol speeds evaporation, while the vinegar lowers the pH back toward the ear canal’s natural acidic range. Place a few drops in each ear after swimming, let them sit for a moment, then tilt your head to drain.
If you prefer a commercial option, over-the-counter ear drying aids like Swim-EAR use 95% isopropyl alcohol with a small amount of glycerin as a base. These work primarily by displacing water and accelerating drying rather than restoring acidity, so the homemade vinegar blend offers a slight advantage on that front. Either option is fine for routine prevention.
One important caveat: don’t use any drops if you have ear tubes, a perforated eardrum, or an ear that’s already infected and painful. The alcohol will sting broken skin, and liquid can pass through a perforation into the middle ear.
Stop Using Cotton Swabs
Cotton swabs are one of the biggest risk factors for swimmer’s ear, and most people use them regularly without realizing the damage. Inserting a swab pushes earwax deeper into the canal, removing the protective coating from the skin closer to the opening. That wax is slightly oily and waterproof. Without it, water clings to the bare canal skin instead of being repelled.
Swabs also create tiny scratches and microabrasions in the delicate canal lining. Those breaks in the skin give bacteria a direct entry point. The combination of stripped-away wax, micro-damaged skin, and trapped moisture is essentially a recipe for infection. Your ears are self-cleaning. Wax naturally migrates outward and falls out on its own. Wiping the outer ear with a towel after a shower is all the cleaning most people need.
Use Earplugs or a Swim Cap
If you swim frequently or you’ve had swimmer’s ear before, keeping water out in the first place is worth the effort. Silicone moldable earplugs conform to the shape of your outer ear and create a seal that prevents most water from entering the canal. Custom-molded plugs from an audiologist offer a tighter fit for serious swimmers or people with recurring problems.
A snug swim cap that covers the ears adds another layer of protection, though it won’t block water as reliably as earplugs on its own. For lap swimmers, combining both is the most effective approach.
Pay Attention to Water Quality
Not all water carries the same risk. The bacterium most commonly responsible for swimmer’s ear thrives in warm, under-treated water. The CDC recommends pools maintain a chlorine concentration of at least 1 ppm (parts per million) and a pH between 7.0 and 7.8 to effectively kill harmful bacteria. Hot tubs need at least 3 ppm because warmer temperatures accelerate bacterial growth and break down chlorine faster.
Lakes, rivers, and untreated bodies of water carry higher bacterial loads than well-maintained pools, so your risk goes up in natural water. If you swim in open water regularly, drying drops after each session become especially important. Hot tubs that smell strongly of chlorine or look cloudy are worth avoiding entirely, as cloudy water often signals poor maintenance regardless of the chemical smell.
Extra Precautions for Children With Ear Tubes
Kids with tympanostomy tubes (the tiny tubes placed through the eardrum to drain fluid) need a modified approach. The tubes create a small opening in the eardrum, which changes the rules. Regular surface swimming is generally fine because it takes roughly two feet of water pressure to force water through the tubes, so splashing around at the surface isn’t a major concern.
Diving underwater is a different story. The increased pressure can push water through the tube and into the middle ear, raising infection risk. Lakes, rivers, and hot tubs pose a higher threat because of their bacterial content, so earplugs are often recommended in those settings. Many surgeons prescribe antibiotic ear drops for use after significant water exposure in children with tubes, typically for several days following the exposure. Your child’s ENT will give specific guidance based on the type of tube placed.
Conditions That Raise Your Risk
Some people are more prone to swimmer’s ear regardless of how careful they are. Narrow ear canals trap water more easily. Skin conditions like eczema or psoriasis that affect the ear canal compromise the skin barrier the same way cotton swabs do, creating entry points for bacteria. People who wear hearing aids or earbuds for long stretches create a warm, enclosed environment that holds moisture in.
Surfers and cold-water swimmers face a unique long-term risk. Repeated exposure to cold water and wind can trigger bony growths in the ear canal called exostoses. These growths narrow the canal over time, trapping water and wax behind them and making infections far more likely. If you surf or swim in cold water regularly and notice increasing difficulty getting water out of your ears, it’s worth having your ear canals examined.
People who produce very little earwax naturally, or who have had their wax professionally removed recently, are also at higher risk. In those cases, preventive vinegar-alcohol drops after water exposure are especially useful to compensate for the reduced natural protection.