Ear pain after swimming is almost always caused by water trapped in the ear canal, a condition known as swimmer’s ear. When water sits in the canal too long, it breaks down the thin layer of protective wax and skin that normally keeps bacteria out. The warm, moist environment left behind becomes an ideal breeding ground for infection. Swimmer’s ear accounts for more than 500,000 emergency department visits in the United States each year.
How Swimmer’s Ear Develops
Your ear canal is lined with a waxy coating that acts as a natural barrier against bacteria and fungi. When water stays trapped in the canal after swimming, it slowly softens and wears away that protective layer. Bacteria that would normally be harmless on the surface of the skin can then penetrate the waterlogged tissue and multiply rapidly. The result is an infection of the outer ear canal, not the deeper middle ear behind the eardrum.
The pain typically starts as mild itching, then progresses to a dull ache that sharpens over a day or two. One reliable way to tell it’s an outer ear infection: tugging on your earlobe or pressing on the small flap of cartilage at the front of your ear canal makes the pain noticeably worse. You may also notice redness, swelling, or clear fluid draining from the ear. In more advanced cases, the drainage turns yellowish and the pain becomes constant rather than only noticeable when you touch the ear.
Swimmer’s Ear vs. Middle Ear Infection
Not all ear infections are the same, and the distinction matters because they’re treated differently. A middle ear infection develops behind the eardrum, usually as a complication of a cold or upper respiratory infection. It’s far more common in babies and young children because their eustachian tubes (the small passages connecting the middle ear to the throat) are shorter and more easily blocked. Middle ear infections often resolve on their own within a few days and don’t always require antibiotics.
Swimmer’s ear, by contrast, is an infection of the outer canal. It’s triggered by moisture rather than a virus, and it always requires treatment with antibiotic ear drops. If your pain started within a day or two of swimming, gets worse when you pull on your ear, and involves visible redness or drainage at the opening of the ear canal, you’re dealing with an outer ear infection.
Pressure-Related Ear Pain
If you were diving underwater or swimming at any real depth, your pain might not be an infection at all. Rapid pressure changes can stretch or damage the eardrum, a condition called barotrauma. This happens when the air pressure inside your middle ear doesn’t equalize with the water pressure outside it, usually because you descended too quickly or had congestion blocking your eustachian tubes.
Barotrauma feels different from swimmer’s ear. The pain is deeper and more intense, often accompanied by a sensation of fullness or stuffiness in the ear, muffled hearing, dizziness, or even nausea. Unlike swimmer’s ear, tugging on the outer ear doesn’t change the pain. Mild barotrauma usually resolves on its own as the eustachian tubes reopen and pressure equalizes, but severe or lingering symptoms need medical evaluation because the eardrum can actually rupture.
When Swimmer’s Ear Gets Serious
Most cases of swimmer’s ear are uncomfortable but straightforward to treat. In rare cases, however, the infection can spread beyond the ear canal into the surrounding bone and tissue. This severe form is more likely in people with diabetes, weakened immune systems, or those undergoing chemotherapy.
Warning signs of a more aggressive infection include deep ear pain that worsens when you move your head, foul-smelling yellow or green drainage, fever, difficulty swallowing, hearing loss, or weakness in the facial muscles on the affected side. These symptoms require prompt medical attention.
What Treatment Looks Like
A standard case of swimmer’s ear is treated with prescription antibiotic ear drops. You’ll typically apply the drops for about a week. Symptoms usually start improving within 48 to 72 hours of starting treatment, though full resolution can take up to two weeks. During treatment, you’ll need to keep your ears dry, which means no swimming and care during showers (a cotton ball coated lightly with petroleum jelly works well as a temporary plug).
If your pain hasn’t improved at all after two to three days of drops, or if the infection hasn’t fully cleared after two weeks, a follow-up visit is warranted to rule out a resistant infection or a different cause of the pain.
How to Get Water Out of Your Ears
The simplest approach is often the most effective: lie on your side with the affected ear facing down, resting your head on a towel. Give gravity a few minutes to work. If that doesn’t do it, try gently tugging on the outer part of your ear to straighten the canal while tilting your head. Chewing, yawning, or shaking your head can also help by shifting the jaw joint, which sits right next to the ear canal and can nudge trapped water free.
A hair dryer on the cool setting, held several inches from the ear, can evaporate residual moisture. Pull down gently on your earlobe to open the canal while you direct the airflow. Never use a hot setting, and never insert anything into the ear canal to try to soak up water. Cotton swabs push water deeper and can scratch the canal lining, actually increasing your infection risk.
Preventing Swimmer’s Ear
The goal is simple: keep your ear canals dry after swimming. Tilt your head to each side after getting out of the water and let trapped water drain. Dry your ears thoroughly with a towel, focusing on the outer ear.
A preventive drop made from equal parts white vinegar and rubbing alcohol can help. The alcohol speeds evaporation while the vinegar creates a slightly acidic environment that discourages bacterial growth. Pour a small amount into each ear after swimming, let it sit for a moment, then tilt your head to drain. Don’t use this mixture if you have ear tubes, a perforated eardrum, or any existing ear pain, as it will sting damaged tissue.
Custom-molded or silicone swim earplugs are another reliable option, especially if you swim frequently or have a history of swimmer’s ear. Keeping pool water properly maintained also matters. Bacteria thrive in water with incorrect pH or insufficient disinfection, so poorly maintained pools and hot tubs carry higher risk than well-chlorinated ones. Natural bodies of water, where bacterial levels are unpredictable, are the most common culprits.