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Blog / Swimmer's Ear (Otitis Externa) Symptoms, Causes & Treatments
Swimmer's Ear (Otitis Externa) Symptoms, Causes & Treatments

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Author: Dr. Liam Regan | Founder of Nassau Clinic in Dublin
Published September 16, 2025

What is Swimmer's Ear?
Swimmer's ear, medically known as otitis externa, is a bacterial infection affecting the outer ear canal that runs from your eardrum to the outside of your head. This common condition typically develops when water remains trapped in your ear after swimming, creating an ideal moist environment for bacterial growth.
At Nassau Clinic Dublin, our specialists frequently treat swimmer's ear, particularly during warmer months when swimming activities increase. The condition can also result from inserting fingers, cotton buds, or other objects into your ears, which damages the protective skin lining your ear canal.
TL;DR: Swimmer’s ear is a bacterial infection of the outer ear canal caused by trapped water or ear trauma. Symptoms range from itching and redness to severe pain and fever. Treatment includes professional cleaning, prescription ear drops, and pain relief, while prevention involves drying ears, using earplugs, and avoiding inserting objects.
Key Takeaways
- Swimmer’s ear, or otitis externa, is a bacterial infection of the outer ear canal, often caused by trapped water after swimming or damage from fingers, cotton buds, or earbuds.
- Early signs include itching, mild redness, slight discomfort, and clear fluid, while severe cases can cause intense pain, fever, blocked ear canal, and swelling.
- Urgent medical attention is needed for severe pain, fever, hearing loss, or signs of spreading infection.
- Treatment begins with professional ear cleaning and prescription ear drops containing antibiotics, antifungals, steroids, or acidic solutions.
- Pain can be managed with over-the-counter medication, and oral antibiotics may be needed for persistent or severe infections.
- Prevention includes drying ears thoroughly, using earplugs, avoiding contaminated water, and never inserting objects into the ear.
Swimmer's Ear Symptoms by Severity
Understanding symptom progression helps determine when to seek professional treatment at Nassau Clinic or your local healthcare provider.
Other Important Early Signs and Symptoms
- Itching sensation in your ear canal
- Slight redness visible inside your ear
- Mild discomfort that worsens when pulling on your outer ear (pinna) or pressing the small bump in front of your ear (tragus)
- Clear, odourless fluid drainage
Moderate Symptoms (Progressive Stage)
- Intensified itching and increasing pain
- More extensive redness throughout your ear
- Excessive fluid drainage from the ear
- Sensation of fullness inside your ear
- Partial blockage of your ear canal due to swelling, fluid, and debris
- Decreased or muffled hearing
Advanced Symptoms (Severe Stage)
- Severe pain radiating to your face, neck, or side of your head
- Complete blockage of your ear canal
- Redness or swelling of your outer ear
- Swollen lymph nodes in your neck
- Fever
You should seek immediate medical attention if you experience severe ear pain, a fever accompanying ear symptoms, complete hearing loss, or signs of a spreading infection. It is also advisable to schedule a consultation with a GP for any mild symptoms that persist for more than two to three days, recurring swimmer’s ear infections, or symptoms that worsen despite over-the-counter treatment.
Nassau Clinic in Dublin offers weekend appointments for urgent concerns. Contact us for expert swimmer's ear diagnosis and treatment.

What Causes Swimmer’s Ear and Who Is at Risk
Swimmer's ear typically results from bacterial infection, though fungal or viral causes are possible. Your ear's natural defence mechanisms can become overwhelmed by:
Moisture-related factors:
- Water trapped in ear canals after swimming
- Excessive sweating
- Prolonged exposure to humid weather
- Inadequate ear drying after bathing
Physical trauma:
- Cleaning ears with cotton buds, hairpins, or fingernails
- Scratches from hearing aids or earbuds
- Aggressive ear cleaning creating tiny skin breaks
High-Risk Situations
- Swimming in contaminated water (lakes, rivers, poorly maintained pools)
- Living in humid climates
- Having narrow ear canals
- Previous ear infections or surgery
- Skin conditions like dermatitis or psoriasis
Treatment Options for Swimmer’s Ear
Getting your ear professionally cleaned is the first step. An ENT specialist will clear out any debris or infected material, which helps the medicated ear drops work better.
Medications
Your doctor will likely prescribe specialised ear drops as part of your treatment. These drops may contain a combination of ingredients designed to target different causes and symptoms. Acidic solutions help restore the ear’s natural antibacterial balance, while steroids reduce swelling and inflammation. If an infection is present, antibiotics can be included to fight bacteria, and antifungals may be added to treat fungal infections.
How to Use Ear Drops
- Warm the drops: Hold the bottle in your hand for a few minutes to bring the liquid to body temperature.
- Position yourself: Lie on your side with the infected ear facing up.
- Administer the drops: Pull your earlobe up and back to straighten the ear canal, then squeeze in the prescribed number of drops.
- Stay still: Remain in that position for several minutes to let the drops soak in.
It can be helpful to have someone assist you to make sure the drops go in correctly.
Managing Pain from Swimmer’s Ear
For most cases, over-the-counter pain relievers like ibuprofen can help manage both pain and inflammation. If the pain is severe and affects your sleep or daily activities, your doctor may prescribe a stronger pain medication.
Important: Do not give aspirin to children under 16 due to the risk of Reye's syndrome.
When to Consider Advanced Treatment
If the infection is severe and doesn't improve with ear drops, you may need more advanced treatment. This could include oral antibiotics, especially if you have a fever or the infection is spreading.

Prevention Strategies for Swimmer’s Ear
1. After Swimming or Bathing
- Tip your head to each side, allowing water to drain naturally
- Gently dry outer ears with a soft towel
- Use a blow-dryer on the lowest setting, held at least 30 cm (12 inches) away
2. Smart Swimming Practices
- Avoid swimming in lakes or rivers with high bacteria warnings
- Wear earplugs or swim caps in public pools
- Choose well-maintained swimming facilities
- Consider avoiding underwater activities if prone to ear infections
3. Daily Ear Care
- Never insert cotton swabs, hair pins, or other objects into ears
- Protect ears with cotton balls when using hair sprays or dyes
- Allow earwax to naturally migrate and clean ears gently
- Consult your doctor before swimming after recent ear infections or surgery
4. Professional Earwax Management
If excess earwax blocks your ear canal:
- Soften wax using cerumol or waxsol or exterol drops
- Professional removal by your ENT specialist for stubborn blockages
Healthy Ears, Happier Days
Trust Nassau Clinic in Dublin for expert care and fast relief from Swimmer’s Ear.
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Complications of Untreated Swimmer's Ear
Complications of untreated swimmer’s ear are relatively uncommon when prompt treatment is given, but they can occur. Possible issues include temporary hearing loss, which usually resolves once the infection has cleared, and chronic otitis externa, a persistent infection lasting for more than three months. In rare cases, the condition may progress to a deep tissue infection (cellulitis), spreading into the deeper layers of the skin. Elderly patients, those with diabetes, and individuals with weakened immune systems are at greater risk of developing these complications.
FAQs About Swimmer’s Ear
How long does a swimmer's ear last?
With appropriate treatment, most swimmer's ear infections resolve within 7–10 days. Mild cases may improve within 3–5 days of starting prescription eardrops.
Can a swimmer's ear spread to other people?
No, a swimmer's ear is not contagious. However, contaminated water sources can affect multiple swimmers.
What's the difference between a swimmer's ear and a middle ear infection?
Swimmer's ear affects the outer ear canal, while middle ear infections occur behind the eardrum. Swimmer's ear typically worsens when touching the outer ear, whereas middle ear infections cause deep, throbbing pain.
How long does swimmer's ear last without treatment?
While a minor case of swimmer's ear might eventually resolve on its own, it is highly advisable to seek medical attention to ensure a faster recovery, prevent severe pain, and avoid potentially serious complications.
Can I swim with a swimmer's ear?
Avoid swimming, bathing, or any water exposure until your doctor confirms the infection has cleared and your ear canal has healed completely.
Is swimmer's ear more common in children or adults?
Both age groups can develop swimmer's ears, but children may be at higher risk due to more frequent swimming and smaller ear canals that trap water more easily.
Expert Care for Swimmer’s Ear in Dublin
At Nassau Clinic, our experienced doctors provide thorough care for swimmer’s ear, helping you get fast relief and avoid future problems. Based in Dublin, we use modern equipment and take the time to give personalised care, making sure you feel supported throughout your treatment. Don’t let swimmer’s ear interfere with your daily life. Contact Nassau Clinic today to find out how we can help you feel better quickly and safely.

Blogs are written by Dr. Liam Regan, a registered specialist with the Medical Council in Ireland (No: 402969) and member of the Irish College of General Practitioners (ICGP No: 225965). Dr. Regan graduated from Barts and the London School of Medicine and has trained across Ireland and the UK. He has a special interest in Sexual Health and Nutrition.
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Table of Contents
- Key Takeaways
- Swimmer's Ear Symptoms by Severity
- What Causes Swimmer’s Ear and Who Is at Risk
- Treatment Options for Swimmer’s Ear
- Managing Pain from Swimmer’s Ear
- Prevention Strategies for Swimmer’s Ear
- Complications of Untreated Swimmer's Ear
- FAQs About Swimmer’s Ear
- Expert Care for Swimmer’s Ear in Dublin