Can otitis externa spread to other pets or humans?

Most cases of otitis externa are caused by bacterial or yeast overgrowth and are not directly contagious to humans; however, certain parasites or fungi can occasionally pass between animals and people. In multi-pet households, keep affected animals separate and ask your vet whether testing or preventive measures are needed.

How long does it typically take to see improvement with otitis externa treatment?

Mild otitis externa often shows improvement within a few days of starting treatment, but a full course typically takes 2–4 weeks. Middle ear or deep infections may require longer and need regular rechecks — always complete the full course as directed to prevent relapse.

Can I clean my pet's ears at home?

Minor ear discharge can be gently cleaned at home using a vet-recommended ear cleaner; however, if the canal is red or swollen, bleeding, has a strong odour, or your pet is in pain, avoid home cleaning and see a vet promptly for professional assessment and care.

When is ear canal culture or advanced imaging needed?

Culture and sensitivity testing may be recommended for recurrent cases, when treatment is not working, or when a deep infection is suspected. CT or MRI may be ordered to assess the middle ear or rule out intracranial involvement — your vet will determine which tests are appropriate.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Otitis Externa & Media in Dogs and Cats: Symptoms, Ear Examination & Treatment [2025]

Otitis externa and media are common ear conditions in pets caused by allergies, infection, or foreign bodies, requiring targeted treatment addressing the underlying cause.

Take 1 minute to check the symptoms first

Last updated: 2026/01/06

Pethealthmap Editorial Team

Sources: WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek Emergency Care Immediately

•Sudden weakness or inability to walk in the hind or front limbs
•Pronounced head tilt with inability to keep the head upright
•Seizures or episodes of brief loss of consciousness

Schedule a Clinic Visit Soon (within 24–72 hours)

•Persistent, frequent scratching at the ear or forceful head shaking
•Ongoing foul odor or yellow discharge from the ear
•Poor balance, walking in circles, or an unsteady gait

01What Symptoms Signal a Problem?

Common clinical signs of otitis externa and media in dogs and cats, including ear discomfort and warning signs that may affect balance.

Head consistently tilted to one side or frequent head shaking
Scratching at the ear with a paw, rubbing the ear, or persistent head shaking
Foul odour from the ear, dark yellow or purulent discharge
Flinching, yelping, or showing signs of pain when the ear is touched
Loss of balance, circling, or an unsteady gait
Decreased appetite or noticeable drop in energy levels

Seek emergency care immediately if you notice the following symptoms:

⚠️ Sudden hind limb weakness or complete inability to move
⚠️ Marked head tilt with inability to maintain balance
⚠️ Seizures or episodes of brief loss of consciousness

02How to Assess Symptoms at Home: Key Observations and Emergency Criteria

Recording key changes and capturing images at home before your vet visit helps the doctor assess the condition more quickly.

Note when scratching or head shaking first appeared and how the frequency has changed
Use your phone to take close-up photos of the ear and video clips of head shaking and gait
Monitor for any changes in alertness, appetite, water intake, and bowel or urinary habits
Weigh your pet and note any recent significant changes in body weight
If discharge is present, photograph it and keep a small sample for potential testing
Compile your notes and images to bring to the specialist clinic for the vet's reference

03How Will the Vet Make a Diagnosis? Common Examination Steps

At the clinic, the vet will use an otoscope and imaging where needed to examine the ear canal and inner ear structures, alongside laboratory tests to identify the cause.

Physical examination

assessing the appearance of the ear canal, pinna, and surrounding tissue

Otoscopic examination

visualising the deep ear canal and checking tympanic membrane integrity

Cytology smear

microscopic evaluation of infection or inflammatory cell types

Bacterial culture and sensitivity testing

identifying the causative organism and antibiotic sensitivity when indicated

Radiographs or skull X-rays

evaluating bony structures around the ear

Advanced imaging (CT or MRI)

assessing the middle ear, inner ear, and any intracranial complications

Seek a specialist or referral centre that can provide culture testing and advanced imaging

04Treatment and Aftercare: Medications, Diet Adjustments, and Home Care

Treatment focuses on controlling infection and reducing inflammation, combined with ear canal management and regular rechecks to confirm efficacy.

Medical therapy: anti-infective and anti-inflammatory medications as prescribed by the vet
Regular follow-up visits: monitoring ear canal hygiene and symptom resolution
Ear canal cleaning or deep flushing: performed by veterinary staff when necessary
Home care: keeping the ear canal dry and completing prescribed medication on schedule
If recurrent or accompanied by neurological signs, consider referral for specialist imaging
Schedule follow-up culture or imaging to confirm infection resolution and tissue recovery

05What to Prepare Before the Vet Visit: Helping the Vet Identify the Cause Quickly

Document a timeline of symptom onset, frequency, and any worsening or improvement

List all current medications, ear drops, or supplements with their names and doses

Bring close-up photos of the ear and video clips of head shaking or gait abnormalities for the vet to review

Save or photograph any ear discharge samples for potential laboratory reference

Bring any existing test reports or images (e.g. previous X-rays or CT scans)

When booking, mention whether culture testing or advanced imaging may be needed so the clinic can prepare

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.