Most problems called ear infections involve inflammation of the outer ear canal, known as otitis externa. Bacteria or yeast may multiply in the inflamed canal, but allergy, mites, moisture, a foreign body or ear shape often creates the conditions that allow the problem to persist.
Home care
Use only the prescribed volume and duration, and return for the recommended recheck even if odour improves. Do not insert cotton buds into the canal or use vinegar, peroxide, oil or leftover drops because a damaged eardrum changes what is safe.
Prognosis
A first uncomplicated outer-ear episode often resolves well. Chronic inflammation can narrow and scar the canal, making treatment harder, so recurrent cases benefit from early investigation rather than repeated short courses of drops.
Summary
Ear treatment works best when it addresses both the current organisms and the reason the canal became inflamed. Microscopic testing and a recheck are practical safeguards against painful recurrence.
Overview
Most problems called ear infections involve inflammation of the outer ear canal, known as otitis externa. Bacteria or yeast may multiply in the inflamed canal, but allergy, mites, moisture, a foreign body or ear shape often creates the conditions that allow the problem to persist.
Symptoms
Head shaking, scratching, redness, pain, odour and waxy or pus-like discharge are common. Affected pets may avoid having the head touched. Head tilt, loss of balance, unusual eye movement or facial weakness can indicate deeper involvement.
Causes
Underlying causes include allergic skin disease, ear mites, plant material, growths and less commonly hormonal or keratinisation disorders. Moisture and traumatic cleaning can worsen inflammation. Middle-ear disease may develop behind an abnormal eardrum.
Risk Factors
Dogs with recurrent allergy, narrow or hairy canals, frequent swimming or previous ear disease are at higher risk. Ear mites are particularly relevant in young cats and multi-pet environments, although not every dark discharge is caused by mites.
Diagnosis
The veterinarian examines the canal and eardrum with an otoscope and usually checks a stained sample under the microscope. Culture or imaging may be needed for severe, resistant or middle-ear disease. Finding the primary cause is essential when infections recur.
Treatment Options
The ear may need careful cleaning and prescription drops selected for the organisms, inflammation and condition of the eardrum. Pain relief or oral treatment is sometimes required. Sedation can be the kindest and safest way to examine or flush a very painful ear.
Recovery
A first uncomplicated outer-ear episode often resolves well. Chronic inflammation can narrow and scar the canal, making treatment harder, so recurrent cases benefit from early investigation rather than repeated short courses of drops.
Prevention
Control underlying allergy or mites, dry ears after swimming and clean only at a frequency and with a product recommended for that pet. Excessive cleaning can irritate a healthy ear and is not preventive care for every animal.
When to Contact a Vet
Arrange prompt assessment for discharge, odour, pain or repeated head shaking. Head tilt, stumbling, vomiting with balance loss, facial droop, severe swelling or sudden distress requires urgent attention.
Frequently Asked Questions
Can I use old ear drops again?
No. The organisms and eardrum status may have changed, and expired or inappropriate drops can fail or cause harm.
Do floppy ears cause infections?
They can reduce ventilation, but ear shape is usually one contributing factor rather than the sole cause. Allergy and moisture often matter more.
How can I tell ear mites from yeast?
Appearance and smell are not reliable enough. Microscopic examination distinguishes mites, yeast and bacteria and guides safe treatment.
