Swimmer’s ear is an infection of the ear canal, the short tube that connects your outer ear to your eardrum. It’s usually caused by bacteria that thrive in warm, moist environments, though fungal infections can also be responsible. Despite the name, you don’t need to be a swimmer to get it. Anything that traps moisture in the ear canal or damages its delicate lining can set the stage for infection.
What Causes Swimmer’s Ear
Your ear canal is lined with a thin layer of skin that acts as a natural barrier against infection. When water sits in the canal for too long, that skin softens and becomes vulnerable to bacteria. The two most common culprits are Pseudomonas aeruginosa and Staphylococcus aureus, both of which are commonly found in water and on skin.
But water exposure is only one piece of the puzzle. Several everyday habits and conditions raise your risk:
- Cotton swabs, fingernails, or hairpins can scratch the canal lining, creating tiny entry points for bacteria.
- Earbuds and hearing aids can cause small breaks in the skin from friction, especially with prolonged use.
- Skin conditions like eczema make the ear canal more prone to irritation and cracking.
So while swimming in a lake or pool is a classic trigger, something as simple as aggressive ear cleaning or wearing earbuds for hours can lead to the same infection.
How It Feels
Swimmer’s ear typically starts mild and gets worse over a day or two if untreated. The earliest sign is often itchiness deep inside the ear, sometimes accompanied by a sense of fullness or pressure. As the infection progresses, pain sets in. A hallmark feature is that the pain sharpens when you tug on your earlobe or press on the small flap of cartilage at the front of your ear. This is one of the easiest ways to distinguish swimmer’s ear from a middle ear infection, which doesn’t respond to external touch the same way.
Other symptoms include:
- Redness and visible swelling of the outer ear
- Fluid or pus draining from the ear
- Muffled hearing, caused by swelling that narrows the canal
- Swollen lymph nodes around the ear or upper neck
- Fever, in more advanced cases
Mild cases might feel like nothing more than an annoying itch. Severe cases can make it painful to chew, talk, or even rest your head on a pillow.
How It Differs From a Middle Ear Infection
People often confuse swimmer’s ear with a standard ear infection, but they affect different parts of the ear. A middle ear infection (otitis media) sits behind the eardrum, usually follows a cold or respiratory illness, and is most common in young children. Swimmer’s ear sits in front of the eardrum, in the canal itself, and is triggered by moisture or skin damage rather than a virus.
The simplest way to tell the difference at home is the tug test. Gently pull on your earlobe. If that makes the pain noticeably worse, swimmer’s ear is the likely cause. Middle ear infections don’t respond to that kind of external pressure. A doctor can confirm the diagnosis by looking into the ear canal with an otoscope. In swimmer’s ear, the canal itself appears red and swollen, while the eardrum, though sometimes mildly irritated, looks relatively normal and moves properly.
Treatment and Recovery Timeline
Swimmer’s ear is treated with prescription ear drops that combine an antibiotic (to fight bacteria) with a steroid (to reduce swelling and pain). The drops are applied directly into the ear canal, usually several times a day. If the canal is too swollen for drops to penetrate, a doctor may place a small sponge wick inside to help deliver the medication deeper.
You should start feeling better within 48 to 72 hours of beginning treatment, though full resolution can take up to two weeks. During recovery, you’ll need to keep the ear dry. That means no swimming, and care during showers. A cotton ball lightly coated with petroleum jelly works well as a water barrier while bathing.
If symptoms haven’t improved after 48 to 72 hours, or if drainage continues past 14 days, a follow-up visit is warranted. The infection may need a different type of drop, or the ear canal may need to be cleaned out by a provider.
When Swimmer’s Ear Becomes Serious
For most people, swimmer’s ear is a painful but straightforward infection that clears with treatment. In rare cases, however, the infection can spread beyond the ear canal into the surrounding bone. This complication, known as malignant or necrotizing otitis externa, is a medical emergency.
It almost exclusively affects specific populations. An estimated 90 to 100 percent of people who develop this complication have diabetes. Other significant risk factors include being over 65, undergoing chemotherapy, living with HIV, or having any condition that weakens the immune system. The complication can lead to bone infection in the skull, facial nerve damage causing paralysis on one side of the face, and in extreme cases, meningitis or brain abscess.
If you’re in one of these higher risk groups and develop ear pain that worsens despite treatment, or if you notice facial weakness or severe headaches alongside an ear infection, seek medical attention promptly.
How to Prevent It
The goal is simple: keep your ear canals dry and their skin intact. After swimming or showering, tilt your head to each side to let water drain naturally. You can also use a hair dryer on its lowest heat setting, held at least a foot away from your ear, to gently evaporate lingering moisture.
A preventive ear drop made from equal parts white vinegar and rubbing alcohol can help after water exposure. The alcohol speeds evaporation while the vinegar creates an acidic environment that discourages bacterial and fungal growth. Pour a few drops into each ear, let them sit briefly, then tilt your head to drain. Skip this if you have any open cuts in your ear, a perforated eardrum, or ear tubes.
Beyond drying, the most important prevention step is leaving your ear canals alone. Resist the urge to clean them with cotton swabs, keys, pen caps, or anything else. The ear canal is self-cleaning. Wax migrates outward on its own. Inserting objects only strips away protective wax and scratches the skin, creating exactly the conditions bacteria need to take hold.