What Is It?
Otitis externa is inflammation or infection of the outer ear canal, the passage between the outside of the ear and the eardrum. It is sometimes called outer ear canal infection or swimmer’s ear.
Otitis externa usually causes ear pain, itching, redness, swelling, ear discharge, or a blocked-ear feeling. The pain may become worse when touching the outer ear or pulling the ear gently, because the inflamed area is in the ear canal.
Most mild cases are not dangerous, but otitis externa can become more painful or complicated if swelling blocks the ear canal, discharge develops, or infection spreads. Symptoms often develop over 1 to 3 days and may worsen if the ear canal remains wet, scratched, or irritated.
Otitis externa is usually considered when pain, itch, swelling, or discharge appears in the ear canal, especially after swimming, water exposure, cotton bud use, ear scratching, earphones, hearing aids, or skin irritation. Other conditions can feel similar, including earwax buildup, middle ear infection, eardrum injury, eczema in the ear canal, fungal ear infection, jaw-related pain, or dental pain.
Why Otitis Externa Is So Common
Otitis externa is common because the ear canal is narrow, warm, and easily irritated. Water trapped in the ear can soften the skin and make it easier for bacteria or fungi to grow. Scratching, cotton buds, ear picking, earphones, hearing aids, or skin conditions can also damage the protective ear canal lining.
People often search for otitis externa because ear pain can feel worrying and may be confused with earwax or middle ear infection. The key clue is often pain or tenderness around the outer ear or ear canal.
What Causes It?
Otitis externa usually happens when the skin inside the ear canal becomes irritated, damaged, or too moist, allowing infection or inflammation to develop.
Common Causes and Risk Factors
Water trapped in the ear
Swimming, showering, sweating, or humid weather can leave moisture in the ear canal. Water can soften the ear canal skin and reduce its natural protection, making irritation or infection more likely.
Cotton buds or ear scratching
Cotton buds, fingernails, hairpins, or ear picking can scratch the ear canal and remove protective wax.
Earphones, earplugs, or hearing aids
Devices placed in the ear may trap moisture, irritate the canal, or cause friction.
Skin conditions
Eczema, dermatitis, psoriasis, or allergies can make the ear canal skin more sensitive and prone to inflammation.
Bacterial or fungal growth
Bacteria are common causes, but fungal infection can also occur. Persistent itching, blocked feeling, or recurrent symptoms may suggest fungal involvement or another ear canal condition.
Otitis externa is different from middle ear infection. Otitis externa affects the ear canal and often hurts when the outer ear is touched, while middle ear infection is deeper behind the eardrum and may follow a cold or respiratory infection.
What Should You Do?
If symptoms are mild, first avoid putting anything into the ear and keep the ear dry. Do not use cotton buds, ear candles, hairpins, or sharp objects, as these can worsen irritation or damage the ear canal.
Avoid using ear products without advice if there is discharge, severe pain, previous eardrum perforation, ear surgery, or ear tubes.
What to Observe First
Pay attention to:
- Whether the pain is in the ear canal or deeper inside
- Whether touching or moving the outer ear worsens pain
- Whether there is itching, swelling, discharge, or blocked-ear feeling
- Whether symptoms started after swimming, showering, ear cleaning, or earphone use
- Whether hearing is reduced gradually or suddenly
- Whether there is fever, severe pain, dizziness, or feeling unwell
- Whether there is diabetes, weakened immunity, previous ear surgery, or eardrum problems
How to Tell If It Is Mild, Moderate, or Severe
Mild otitis externa may cause itch, mild discomfort, slight redness, or early tenderness in the ear canal.
Moderate otitis externa may cause stronger pain, swelling, discharge, blocked-ear feeling, or reduced hearing.
Severe or complicated symptoms include severe pain, spreading redness around the ear, fever, dizziness, sudden hearing loss, facial weakness, or symptoms in higher-risk people.
How Is It Usually Managed?
Otitis externa is usually managed by reducing moisture, avoiding further irritation, and assessing whether infection or inflammation is present. A pharmacist can help decide whether symptoms sound like simple outer ear irritation, earwax buildup, otitis externa, or another ear problem.
Self-care is not always suitable. Ear symptoms with severe pain, discharge, sudden hearing loss, previous eardrum perforation, ear surgery, diabetes, or weakened immunity should be assessed by a healthcare professional.
People with diabetes or weakened immunity should seek earlier medical advice because ear canal infections can occasionally become more serious.
Ask a Pharmacist If Unsure
Ask a pharmacist if ear discomfort is mild but persistent, especially after swimming, water exposure, earphones, hearing aids, or cotton bud use.
Seek advice earlier for children under 5 years old, adults aged 65 years and above, people with diabetes, weakened immunity, previous ear surgery, eardrum perforation, hearing aids, or recurrent ear infections.
When to See a Doctor
See a doctor or ear care professional if symptoms are linked with:
- Severe or worsening ear pain
- Ear discharge, blood, or pus
- Fever or feeling unwell
- Swelling or redness spreading around the ear
- Sudden hearing loss
- Spinning dizziness or severe balance problems
- Facial weakness
- Symptoms after ear injury or inserting an object into the ear
- History of eardrum perforation, ear surgery, or ear tubes
- Diabetes, weakened immunity, or severe skin infection
- Symptoms not improving after 2 to 3 days
- Ear symptoms in a child under 2 years old
Quick Summary
- Otitis externa is inflammation or infection of the outer ear canal.
- It is sometimes called swimmer’s ear.
- Symptoms often develop over 1 to 3 days.
- Water exposure, cotton buds, scratching, earphones, hearing aids, and skin conditions can increase risk.
- Seek medical advice for severe pain, discharge, fever, sudden hearing loss, dizziness, facial weakness, diabetes, weakened immunity, or previous ear problems.
FAQ
What is otitis externa?
Otitis externa is inflammation or infection of the outer ear canal, the passage between the outside of the ear and the eardrum.
Is otitis externa serious?
Most mild cases are not serious, but severe pain, discharge, fever, spreading redness, dizziness, sudden hearing loss, or high-risk medical conditions need assessment.
Is otitis externa contagious?
Otitis externa is usually not contagious. It commonly develops from moisture, irritation, scratching, or local infection in the ear canal.
How long does otitis externa last?
Symptoms often develop over 1 to 3 days. Persistent, worsening, or severe symptoms should be checked.
Why does swimming trigger otitis externa?
Water can soften the ear canal skin and reduce its natural protection, making irritation or infection more likely.
Can I use cotton buds if my ear is itchy?
No. Cotton buds can scratch the ear canal, push wax deeper, and worsen irritation or infection.
Is otitis externa the same as earwax buildup?
No. Earwax buildup usually causes blocked-ear feeling or gradual hearing reduction. Otitis externa is more likely to cause pain, itch, swelling, tenderness, or discharge.
When should I see a doctor for otitis externa?
See a doctor if ear pain is severe, worsening, linked with discharge, fever, sudden hearing loss, dizziness, spreading redness, facial weakness, diabetes, weakened immunity, previous ear surgery, or symptoms in a child under 2 years old.