What a fungal ear infection is
The ear canal is a skin-lined tube about 2.5 cm long that ends at the eardrum. It normally protects itself with earwax, which is slightly acidic and water-repellent. When this protection is disturbed by water, scratching, cotton buds, hearing aids or drops, germs can grow. Most outer ear infections (otitis externa) are bacterial, but around 10 per cent are fungal, and the proportion is higher in hot, humid climates and after antibiotic drops.
The most common fungi are Aspergillus species (which can produce black, grey or yellow-green spores) and Candida (white, creamy debris). They live harmlessly in the environment and on skin and only cause infection when conditions in the ear canal favour them.
Symptoms of otomycosis
- Itching deep in the ear, often more intense than in bacterial infections.
- A blocked or full feeling and muffled hearing.
- Discharge, which may be thick, white, grey, yellow or black.
- Mild to moderate ear pain, worse when the outer ear is pulled.
- Ringing or a fluttering sensation in some people.
- Symptoms that persisted or worsened after antibiotic ear drops.
For bacterial outer ear infections, see swimmer's ear; for itching without infection, see itchy ears.
Risk factors
- Antibiotic or steroid ear drops: they kill bacteria and change the ear canal environment, allowing fungi to grow.
- Water: swimming, showering and humid weather keep the canal moist.
- Cleaning habits: cotton buds, fingers or objects remove protective wax and damage the skin.
- Hearing aids and earbuds: trap moisture and heat.
- Skin conditions: eczema or psoriasis in the ear canal.
- Diabetes and weakened immunity: increase the risk and severity of fungal infection.
- Previous ear surgery or a perforated eardrum.
How it is diagnosed
A doctor or ENT specialist looks into the ear with an otoscope or microscope. Fungal debris has a typical appearance: fluffy white or grey material, sometimes with black or dark spots of spores, or creamy white debris with Candida. A swab can be sent to the laboratory to identify the fungus if the diagnosis is uncertain or the infection keeps returning. The eardrum is checked carefully, because a hole in it changes which treatments are safe.
Treatment of a fungal ear infection
- Ear cleaning: removing fungal debris is the most important step. ENT clinics usually do this by microsuction under a microscope. Without cleaning, drops cannot reach the skin and the infection tends to persist.
- Antifungal drops or cream: such as clotrimazole, used for one to three weeks and continued for some days after symptoms settle. Some combination drops also contain antifungal agents.
- Acidifying drops: some clinicians use acetic acid drops to restore the canal's normal acidity.
- Stopping antibiotic drops: unless a bacterial infection is also present.
- Repeat cleaning: a follow-up visit may be needed to remove remaining debris.
- Oral antifungals: rarely needed, mainly for severe or resistant infections or in people with weakened immunity.
Some drops are not suitable if the eardrum is perforated; your doctor will choose the right preparation. See perforated eardrum.
What to do at home
- Keep the ear dry: use a cotton wool ball coated with petroleum jelly in the ear when showering, and avoid swimming until the infection has cleared.
- Do not use cotton buds or try to clean the debris yourself.
- Use the drops exactly as prescribed: lie with the affected ear up for a few minutes after applying them.
- Remove hearing aids or earbuds as much as possible during treatment.
- Take simple painkillers if needed.
- Do not use hydrogen peroxide or home remedies without advice; see hydrogen peroxide in the ear.
Preventing it from coming back
- Dry the ears gently after swimming or showering by tilting the head; a hair dryer on a low, cool setting at arm's length can help.
- Avoid cotton buds; earwax usually clears itself. See best way to clean ears.
- Use antibiotic ear drops only when prescribed and for the recommended time.
- Clean hearing aids and earbuds regularly and let them dry.
- Treat skin conditions such as eczema in the ear canal.
- Keep diabetes well controlled.
Ear fungus: what it looks like
Many people search for “ear fungus” after seeing or feeling something unusual in the ear canal. The fungi that cause otomycosis are usually moulds of the Aspergillus family or yeasts such as Candida, and they can look different:
- Black, grey or dark specks on a whitish, fluffy layer, like damp blotting paper: typical of Aspergillus niger.
- White or yellowish creamy debris: more typical of Candida and other yeasts.
- Wet, flaky or cotton-like material that keeps coming back after cleaning.
Only a doctor looking with an otoscope or microscope can confirm it, because wax, dried discharge and skin flakes can look similar. Do not try to scrape it out with cotton buds or other objects: this pushes it deeper and can damage the skin of the canal or the eardrum.
Can ear fungus spread to the brain?
In healthy people, otomycosis stays in the outer ear canal and does not spread to the brain. Rarely, in people with poorly controlled diabetes or a weakened immune system, an ear canal infection can spread into the surrounding bone at the base of the skull (necrotising or malignant otitis externa). Warning signs are severe, deep ear pain that keeps getting worse, especially at night, persistent discharge despite treatment, headache, and weakness of the face. These need urgent assessment by an ENT specialist.
Fungus behind the ear
A red, scaly or itchy rash in the fold behind the ear is a skin problem, not otomycosis. Common causes are seborrhoeic dermatitis, eczema, a yeast infection in the skin fold (intertrigo) and, less often, ringworm. Antifungal or mild steroid creams are often used, but it is worth seeing a doctor or pharmacist to confirm the cause, particularly if the rash spreads into the ear canal or keeps coming back.
When to see a doctor
- Severe or increasing ear pain, or swelling and redness spreading to the outer ear or face.
- Fever or feeling unwell.
- Sudden or significant hearing loss.
- Symptoms lasting more than a week despite treatment.
- Diabetes or a weakened immune system with ear pain and discharge: see a doctor promptly, as rare deep infections need urgent care.
- Facial weakness or dizziness.
Key points to remember
- Otomycosis is a fungal infection of the outer ear canal causing itching, blockage and discharge.
- It often follows antibiotic drops, swimming or humidity.
- Cleaning the ear canal and antifungal drops are the core treatment.
- Keeping the ears dry and avoiding cotton buds helps prevent recurrence.
Questions about fungal ear infections
These answers are general information and do not replace an examination or individual medical advice.
How do I know if my ear infection is fungal?
Intense itching, a blocked feeling and discharge that may look white, grey or black, often after antibiotic drops or swimming, suggest it. A doctor can confirm it.
Will a fungal ear infection go away on its own?
Usually not. It needs cleaning of the ear canal and antifungal treatment.
What drops treat a fungal ear infection?
Antifungal drops such as clotrimazole are commonly used. Your doctor chooses the right drop, especially if the eardrum has a hole.
How long does otomycosis take to clear?
Usually one to three weeks of treatment after cleaning. Follow-up cleaning may be needed.
Can I swim with a fungal ear infection?
It is better to keep the ear dry until the infection has cleared and your doctor confirms the canal is healthy.
Why do I keep getting fungal ear infections?
Moisture, cotton buds, hearing aids, eczema, diabetes and repeated antibiotic drops are common reasons. Addressing them reduces recurrences.
What does ear fungus look like?
Often a fluffy white layer with black or grey specks, or creamy white debris. A doctor needs to confirm it, because wax and dried discharge can look similar.
Can a fungal ear infection spread to the brain?
Not in healthy people. Rarely, in people with diabetes or weak immunity, an ear canal infection can spread into the skull bone, causing severe worsening pain; this needs urgent care.
What is the fungus behind my ear?
A rash behind the ear is usually seborrhoeic dermatitis, eczema or a skin-fold yeast infection, not an infection of the ear canal.
Sources
- NHS · Outer ear infection (otitis externa)
- Rosenfeld RM, et al. Clinical practice guideline: acute otitis externa. Otolaryngol Head Neck Surg. 2014
- NHS · Earwax build-up
This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.