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Understanding Otitis Externa (Swimmer’s Ear): Symptoms, Causes and Treatment Methods

7 min read
Published 8 Apr 2025 / Last Updated 12 Aug 2026
Reviewed by Soh Lee Lee
Otitis Externa - featured image

The ear consists of three main parts: the outer ear (which includes the pinna and external ear canal), the middle ear located behind the eardrum, and the inner ear where the cochlea is found. A common condition that affects the outer ear is otitis externa, also known as Swimmer’s Ear or outer ear infection.

Despite its name, otitis externa can affect anyone. It’s a fungal or bacterial infection caused by water trapped in the ear canal. In this article, we’ll explore the symptoms, causes, and treatment options for otitis externa, along with tips for prevention.

Symptoms of Otitis Externa

Otitis externa can manifest through a variety of symptoms, often causing discomfort and irritation. Recognising them early can help with prompt treatment. Common symptoms include:

  • Itching in the ear canal
  • Foul-smelling fluid discharge from the ear
  • A feeling of fullness or blockage in the ear
  • Muffled hearing
  • Redness or swelling of the outer ear
  • Swollen lymph nodes around your ear

Causes and Risk Factors of Otitis Externa

Otitis externa can arise from various factors that disrupt the ear canal’s natural defences. This section will discuss possible causes and risk factors of otitis externa.

Skin injury

Scratching or cleaning your ear with your fingers or an ear pick can damage the delicate skin in your ear canal. When the skin is damaged, bacteria that normally reside on the surface can cause an infection, leading to otitis externa.

Removal of earwax

Earwax plays a vital role in protecting the ear canal as it has natural anti-bacterial and anti-fungal properties. However, this protective barrier can be compromised due to excessive moisture in the ear or overcleaning. As a result, you may become more susceptible to otitis externa.

Exposure to water

If you enjoy swimming or other water activities, you might be at a greater risk of developing otitis externa because water can wash away too much earwax. Additionally, exposure to contaminated water can introduce bacteria into the ear, leading to an external ear infection.

High humidity

Humid environments can increase the risk of otitis externa, as fungi thrive in moist conditions. Thus, those living in tropical regions tend to be more prone to such ear infections.

Skin conditions

Skin conditions such as eczema or psoriasis can increase the risk of developing otitis externa. These conditions often lead to dryness, irritation, and inflammation in the ear canal, making it more susceptible to infections.

Diabetes

Diabetes can elevate the risk of ear infections due to compromised immune function, which makes it harder for the body to fight infections. Additionally, individuals with diabetes are more susceptible to a severe form of the infection known as malignant otitis externa, where the infection can extend to the skull bone.

Treatment for Otitis Externa

Treating otitis externa typically involves addressing the infection and alleviating symptoms. With appropriate treatment, most cases can be resolved within 7 to 10 days. The following treatment methods are often recommended for otitis externa and work hand-in-hand to tackle the infection and its symptoms.

Aural toilet

Aural toilet, also known as ear cleaning, is a procedure to remove wax and debris from the ear. This procedure is often recommended as the first step in treating otitis externa and is crucial in ensuring the effectiveness of topical antibiotics.

Once wax and debris have been removed from the ear, your hearing care professional can also check the condition of your eardrum and ensure that it’s intact.

Topical antibiotics

Antibiotic ear drops may be used to target bacteria in the ear, thereby eliminating the infection. In some cases, an ear wick, which is a small sponge, may be used to help the antibiotics penetrate deeper into the ear canal. It will be placed in the ear to hold the ear drops against the skin, ensuring more effective treatment.

Note!

Oral antibiotics are usually only recommended for severe cases. In most instances, topical antibiotics would be the most effective treatment method.

Analgesics

Doctors may prescribe over-the-counter pain medication, also known as analgesics to alleviate any pain and discomfort associated with the ear infection. This can provide relief while the underlying condition is treated.

Preventing Otitis Externa

Taking preventive measures can significantly reduce the risk of developing otitis externa. These simple habits can keep your ears healthy and protect them from infection.

Avoid cleaning your ears

Your ears have a natural self-cleaning mechanism that effectively manages earwax buildup. Avoid cleaning your ears with Q-tips or even your fingers, as this can disrupt the ear’s natural process, compact ear wax deeper into the ear canal and introduce bacteria to the ear canal. Leaving your ears to clear out wax naturally will help reduce the risk of infections like otitis externa.

Prevent water from entering your ears

To protect your ears during water activities, consider wearing swim plugs or a swimming cap to keep your ears dry. Minimising exposure to moisture and potential contaminants in the water can also lower the risk of developing otitis externa. As such, avoid entering water bodies that are visibly contaminated or poorly maintained.

Keep your ears dry

Keeping your ears dry is essential in preventing ear infections. After water activities, gently dry the outer ear canal with a towel. If water has entered your ear, tilting your head toward the affected side can help facilitate drainage. If that doesn’t work, learn how else to get water out of your ears here.

When to See a Doctor

If you notice any of the following signs, seek medical attention from an Ear, Nose and Throat (ENT) doctor immediately:

  • Persistent ear pain that worsens over time
  • Foul-smelling discharge from the ear
  • Significant swelling or redness around the ear
  • Hearing loss or a feeling of fullness in the ear that doesn’t improve
  • Fever accompanying ear symptoms

FAQs About Otitis Externa

Otitis Externa

Otitis Media

Affected part of the ear

Ear canal

Middle ear

Causes

Bacteria or fungi

Bacteria or virus

Treatment

Treatment is necessary for recovery.

Antibiotic or corticosteroid ear drops are typically prescribed. Depending on your condition, pain medication may also be prescribed.

Typically resolves naturally. If treatment is necessary, the following may be prescribed:

Over-the-counter pain medication
Antibiotics for bacteria infection
Tympanostomy (a small tube inserted into the eardrum) to drain fluid from the middle ear

Take Charge of Your Hearing Health

Otitis externa is a preventable and treatable condition that affects the outer ear canal. Recognising symptoms early and seeking appropriate treatment is important for recovery within a short period. Additionally, preventive steps like keeping ears dry and avoiding excessive cleaning can lower the risk of infection. If symptoms persist or worsen, it’s important to seek medical attention to prevent further complications.

This article was originally published on Upbeat Geek.

Soh Lee Lee

Lee Lee takes pride in her work and is dedicated to providing knowledge and counselling for all with hearing loss to increase awareness of the importance of early intervention.

She also strongly believes in helping patients to understand their hearing condition better, while shaping realistic expectations and cultivating independence within themselves.

Soh Lee Lee

Senior Clinical Audiologist

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