Swimmer’s ear is an infection of the ear canal, the narrow passage that runs from your outer ear to your eardrum. Unlike a middle ear infection (which builds up behind the eardrum and is common in young children), swimmer’s ear develops on the outer side and can affect anyone at any age. It accounts for roughly 2.4 million healthcare visits per year in the United States, with 44% of those visits happening during June through August.
How the Infection Starts
Your ear canal is naturally protected by a thin layer of earwax, which creates a slightly acidic, water-resistant barrier against bacteria and fungi. Swimmer’s ear develops when that barrier breaks down. The most common trigger is water that stays trapped in the ear canal after swimming or bathing. Moisture softens the skin lining the canal, dilutes the protective earwax, and raises the local pH, all of which let bacteria multiply.
Swimming in lakes, ponds, rivers, and oceans carries a higher risk than pool swimming because freshwater tends to harbor more bacteria. But pools aren’t risk-free, and you don’t need to swim at all to get swimmer’s ear. Anything that disrupts the ear canal’s natural defenses can set the stage: cotton swabs, bobby pins, or other objects that scratch the delicate skin; earbuds or hearing aids that trap warmth and moisture; or simply living in a humid, tropical climate. Overcleaning your ears can actually work against you by stripping away the earwax your body uses as a shield.
Symptoms at Each Stage
Swimmer’s ear typically progresses through three recognizable stages if left untreated.
In the mild stage, you’ll notice itching inside the ear canal, minor discomfort, and possibly a small amount of clear, odorless drainage. Many people mistake this for water still trapped in the ear.
If it advances to a moderate stage, the itching gives way to real pain. The ear canal swells, partially narrowing the opening. You may see thicker, yellowish drainage, and the pain sharpens noticeably when you tug on your earlobe or press on the small flap of cartilage (the tragus) at the front of the ear. That tragal tenderness is one of the easiest ways to distinguish swimmer’s ear from a middle ear infection, which doesn’t hurt with external pressure.
At the severe stage, pain becomes intense and can radiate to the face, neck, or side of the head. The ear canal may swell completely shut, causing temporary hearing loss. Redness and swelling can spread beyond the ear itself, and the lymph nodes near the jaw or neck often become tender and enlarged.
How It Differs From a Middle Ear Infection
The confusion between swimmer’s ear and a middle ear infection is common because both involve ear pain. A middle ear infection usually follows a cold or upper respiratory illness, produces a feeling of pressure or fullness deep in the ear, and is most frequent in children under five. Swimmer’s ear, by contrast, starts with itching, worsens with any movement of the outer ear, and produces visible drainage from the canal. If pulling on your earlobe makes the pain spike, swimmer’s ear is the more likely culprit.
Treatment and Recovery Timeline
Most cases of swimmer’s ear are treated with prescription eardrops that fight the infection and reduce swelling in the canal. If the canal is too swollen for drops to reach the infection, a provider may place a small wick (a thin sponge) inside to help draw the medication deeper. The wick is typically removed after a couple of days once the swelling has gone down enough for drops to flow freely.
Symptoms usually begin improving within two to three days of starting treatment, and pain generally resolves within four to seven days. Full recovery can take up to two weeks before the ear feels completely normal. During treatment, you should stay out of the water for 7 to 10 days. After finishing your full course of drops, you can return to swimming two to three days later, provided the pain is gone and you use earplugs.
When Swimmer’s Ear Becomes Dangerous
In rare cases, the infection can spread beyond the ear canal into the surrounding bone and tissue, a condition sometimes called malignant or necrotizing otitis externa. Despite the alarming name, “malignant” here refers to aggressiveness, not cancer. This complication is most common in people with diabetes, weakened immune systems, or those undergoing chemotherapy.
Warning signs include ongoing foul-smelling drainage that is yellow or green, deep ear pain that worsens when you move your head, fever, difficulty swallowing, or weakness in the muscles of your face. If the infection continues to spread, it can damage cranial nerves or reach the brain. Severe cases can be life-threatening and require aggressive treatment well beyond standard eardrops.
Prevention
Keeping your ear canals dry is the single most effective way to prevent swimmer’s ear. After swimming or bathing, tilt your head to each side and let gravity pull the water out. Dry only your outer ear with a soft towel. If water feels persistently trapped, a hair dryer on the lowest heat and speed setting, held several inches from the ear, can gently evaporate residual moisture.
If you swim frequently and know you don’t have a perforated eardrum, homemade preventive drops can help restore the ear canal’s acidic environment. Mix equal parts white vinegar and rubbing alcohol, and place a few drops in each ear after swimming. The vinegar discourages bacterial growth while the alcohol speeds evaporation. Custom-fit or over-the-counter swim earplugs are another practical option, especially for people with a history of repeat infections.
Resist the urge to clean inside your ear canals with cotton swabs or other objects. Earwax is not debris to be removed. It’s an active part of your ear’s defense system, and leaving it alone is one of the simplest things you can do to keep infections from starting in the first place.