What Is an Outer Ear Infection (Otitis Externa) and How Is It Treated?

An outer ear infection, medically known as otitis externa, is an infection or inflammation of the outer ear canal that runs from your eardrum to the outside of your head. Because it often develops after spending a long time in the water—like enjoying the beautiful beaches of the Turkish Riviera or local pools—it is commonly called "swimmer's ear". When treated early, it clears up quickly. If neglected, it can lead to severe pain, swelling in the ear canal, and temporary hearing loss.

• An outer ear infection is a bacterial or fungal infection of the skin in the ear canal.
• The most common cause is moisture left in the ear and irritation from using cotton swabs.
• Key symptoms include ear pain, itching, foul-smelling discharge, and a feeling of fullness in the ear.
• Treatment usually involves professional cleaning by a specialist and prescription ear drops.
• Patients with diabetes or weakened immune systems need careful monitoring, as the risk of the infection spreading is higher.

What Is an Outer Ear Infection (Otitis Externa)?

The outer ear canal is a tube about 2.5 centimetres long that begins at the outer ear and ends at the eardrum. The lining of this canal has a natural, protective acidic layer and earwax, medically known as "cerumen". Cerumen repels water, protecting the ear from moisture, while its acidic nature prevents bacteria and fungi from multiplying.

An outer ear infection occurs when this natural defence shield weakens or disappears entirely. When the protective barrier is compromised, bacteria (most commonly Pseudomonas aeruginosa or Staphylococcus aureus) or fungi naturally found in the environment settle into the skin of the ear canal and multiply rapidly. While it can affect any age group, it is particularly common among children and young adults during the hot Turkish summer months when pool and sea usage increases.

Causes and Risk Factors of Outer Ear Infections

Many factors can disrupt the natural environment of the ear canal and pave the way for infection. Moisture and physical trauma are the leading culprits.

• Water Contact and Moisture: Water pooling in the ear canal from swimming, frequent bathing, or heavy sweating softens the skin and disrupts its acidic balance. Poorly chlorinated pools or swimming in polluted seawater carry a particularly high risk.
• Improper Cleaning Habits: Trying to scratch or clean the ear with cotton swabs, hairpins, keys, or sharp fingernails irritates the delicate skin inside the canal. These micro-scratches open the door for bacteria to slip beneath the skin.
• Chemicals: Hair spray, hair dye, or shampoo getting into the ear can cause allergic reactions and irritation on the skin.
• Skin Conditions: Skin problems like eczema, psoriasis, or seborrheic dermatitis compromise the integrity of the skin in the ear canal, increasing the risk of infection.

Who Is at Higher Risk?

Athletes who swim regularly and people living in warm, humid climates are more prone to outer ear infections. Additionally, people with narrow ear canals have a higher chance of water getting trapped inside. Those who wear hearing aids or frequently use in-ear headphones also face an increased risk due to the friction and moisture buildup caused by the devices.

What Are the Symptoms of an Outer Ear Infection?

Symptoms of an outer ear infection usually start mild and, if left untreated, worsen over a few days. The symptoms vary depending on the stage of the infection.

In the initial stage, you will likely notice a mild itch and a feeling of discomfort in the ear canal. The outer ear may become slightly red, and a small amount of clear, odourless fluid might drain from the ear. At this point, there is usually no severe pain, but a feeling of fullness in the ear begins.

As it progresses to the moderate stage, the pain becomes more pronounced. The pain typically worsens when the outer ear is touched, the earlobe is pulled, or the jaw is moved (such as when chewing or yawning). The ear canal starts to swell, and the discharge becomes purulent, yellow-green, and foul-smelling. Because of the swelling and fluid buildup, sounds may seem muffled, and the ear feels blocked.

In the advanced stage, the pain reaches a severe level; it can radiate to that side of the face, the neck, or the side of the head. The ear canal may swell completely shut. This can be accompanied by a high fever and swollen lymph nodes in the neck. Advanced stage symptoms require urgent medical attention.

How Is It Diagnosed at the Hospital?

When you visit the hospital with complaints of ear pain and discharge, an Ear, Nose, and Throat (ENT) specialist will first ask about your medical history and recent activities (such as swimming or ear cleaning habits). During the physical examination, your doctor will gently move your outer ear to gauge your pain response; experiencing pain from this movement is one of the most classic signs of an outer ear infection.

For a definitive diagnosis, the ear canal is examined using a lighted instrument with a magnifying lens called an "otoscope". During the otoscopic exam, the doctor looks for redness, swelling, skin flaking, and purulent discharge in the ear canal. Your doctor will also check if the eardrum is intact to rule out a middle ear infection.

In cases of infections that do not respond to standard treatments, recur frequently, or are very severe, your doctor may take a small swab of the ear discharge. This sample is sent to the laboratory for a culture test. A culture test identifies the specific type of bacteria or fungus causing the infection, ensuring the most effective medication is chosen.

How Is an Outer Ear Infection Treated?

The primary goal in treating an outer ear infection is to eliminate the infection, reduce swelling in the ear canal, and relieve the patient's pain. The treatment process is generally carried out as a combination of clinical procedures and continued medication use at home.

One of the most important steps in treatment is ear cleaning. Using a special vacuum device (aspirator), the specialist carefully removes accumulated pus, dead skin cells, and excess wax from the ear canal. This procedure is critical so that the prescribed ear drops can directly reach the infected tissues. Medication dropped into a blocked ear will just sit on the surface and will not promote healing.

After cleaning, ear drops containing antibiotics or antifungal agents are usually prescribed. These drops often also contain a corticosteroid (steroid) to rapidly reduce swelling and redness in the ear canal. If the ear canal is too swollen for the drops to pass through, your doctor might insert a small, sponge-like wick (ear wick) into the canal. The drops are applied onto this wick, which absorbs the medicine and carries it deep into the swollen tissues.

Home Care and the Healing Process

In addition to medical treatment, there are a few rules you must follow at home. The ear must be kept absolutely dry during the healing process. To prevent water from entering your ear while bathing, you can use a cotton ball coated in petroleum jelly or wear a shower cap. You should avoid swimming, scuba diving, and flying until your doctor gives you the all-clear. Furthermore, the use of headphones or hearing aids should be paused until the infection has completely cleared.

Possible Complications and Risk Groups

When treated correctly, an outer ear infection usually heals without leaving any permanent damage. However, if treatment is delayed or if the patient belongs to certain risk groups, serious complications can develop.

The most common complication is temporary hearing loss. Swelling and pus in the ear canal block sound waves from reaching the eardrum. Once the infection is cleared, hearing function returns to normal.

Another rare but life-threatening complication is "Necrotizing (Malignant) Otitis Externa". In this condition, the infection spreads from the ear canal to the surrounding cartilage and bone tissue. Older adults with diabetes, patients undergoing chemotherapy, or individuals with weakened immune systems are particularly at risk. An infection that spreads to the bone can cause severe pain and cranial nerve paralysis, requiring hospitalization and long-term intravenous antibiotic therapy.

When to See a Doctor?

A mild ear itch or ache might pass quickly, but if symptoms are progressing, you should see a specialist without delay. Home remedies like warm compresses or painkillers only provide temporary relief; they do not treat the infection.

You should go to the emergency room or call 112 (the emergency number in Türkiye) if you experience any of the following warning signs:

• Sudden, unbearable ear pain that wakes you up at night.
• A high fever of 38°C or above accompanying the ear pain.
• Numbness, tingling, or weakness in the facial muscles on one side of your face (suspected facial paralysis).
• Confusion, severe headache, or sudden onset of dizziness.

If your pain is not severe but you have foul-smelling discharge from the ear, are experiencing hearing loss, or if your symptoms do not improve within a few days, you should definitely book an appointment with an ENT specialist.

Diagnosis and Treatment Process at BHT CLINIC

At the BHT CLINIC İstanbul Tema Hastanesi Ear, Nose, and Throat (ENT) Diseases department, the diagnosis and treatment of all ear conditions, including outer ear infections, are meticulously carried out by our specialist physicians. Thanks to the modern endoscopic and microscopic imaging systems in our outpatient clinics, your ear canal is examined in detail, the extent of the infection is clearly determined, and the most appropriate treatment plan is created for you.

Sometimes ear pain can be confused with other illnesses or referred from another area. For example, a prolonged upper respiratory tract infection can turn into sinusitis, creating pressure and pain in the ears. To learn more about such conditions, you can read our article titled That Lingering Cold Might Actually Be Sinusitis.

Our hospital is always by your side with its 24/7 emergency department for suddenly developing, unbearable ear pain. To start your treatment process without delay and protect your ear health, you can easily book your appointment through our call centre or online system.

Frequently Asked Questions

How many days does it take for an outer ear infection to go away?

When appropriate medical treatment is started, symptoms like pain and swelling usually begin to ease within 2 to 3 days. It takes an average of 7 to 10 days for the infection to be completely cleared from the ear canal and for the tissues to heal. Even if your complaints decrease during this time, it is crucial to use the drops prescribed by your doctor for the full duration specified.

Is an outer ear infection contagious?

No, otitis externa is not directly contagious from person to person. You will not pass an ear infection to someone living in the same house. However, the bacteria or fungi causing the infection can be found in shared, inadequately chlorinated pool water.

What is good for an outer ear infection at home?

The safest thing you can do at home is to keep the ear strictly dry and use the medications prescribed by your doctor regularly. Putting substances like olive oil, onion juice, vinegar, or garlic into the ear can make the infection much worse. To relieve pain, you can place a warm towel or a hot water bottle (at a temperature that will not burn the skin) on the outside of the ear.

How can I prevent ear infections while swimming?

After getting out of the pool or sea, gently dry your ears with a clean, soft towel. Tilt your head to both sides to allow any water in the ear canal to drain out. Strictly avoid using cotton swabs. If you frequently suffer from outer ear infections, using custom-fit silicone earplugs—available at pharmacies—while swimming will provide protection.

This article is for informational purposes only; please consult your physician for diagnosis and treatment.