CONDITION
Otitis Media
Otitis media refers to inflammation within the middle ear — the small, air-filled chamber that sits behind the eardrum. This space is normally sealed off from the outside world, but inflammation here can arise when infection or other processes extend inward from the external ear canal, or less commonly when material travels up through the tube that connects the middle ear to the back of the throat. Because the middle ear sits close to important structures including nerves and the inner ear, changes here can produce effects that extend beyond what an owner might associate with a typical ear problem. Many owners first notice signs that overlap with outer ear inflammation — head shaking, ear discomfort, or discharge — but some dogs and cats show additional patterns such as a head tilt, reluctance to open the mouth fully, or changes in balance. In other cases, otitis media is identified during investigation of a persistent or recurring outer ear problem that has not responded as expected. The condition is not always obvious from the outside, and the signs an owner observes often depend on whether the eardrum remains intact and how much the inflammation affects neighbouring structures. This page explores the signals that can appear when the middle ear is involved, the mechanisms that allow inflammation to develop in this normally protected space, the ways otitis media is investigated and confirmed, and the range of approaches used to address it. The goal is to help owners understand what may be happening and what shape the conversation with their veterinary team might take.
Why this matters now
Otitis media can develop at any age, but it tends to be seen more often in dogs and cats with a history of long-standing or recurrent outer ear inflammation. Breeds predisposed to chronic ear canal disease — such as Cocker Spaniels, Shar Peis, and cats with narrow ear canals or underlying allergic conditions — may be at higher risk, though any animal can be affected if the right conditions arise. In some cases, the middle ear becomes involved following a single severe episode of outer ear infection; in others, it represents the culmination of repeated cycles of inflammation over months or years.
The condition often progresses gradually, particularly when it develops as an extension of chronic outer ear disease. Early inflammation may produce subtle signs that overlap with what an owner has seen before, making the shift into the middle ear difficult to recognise without examination. In other animals, the eardrum ruptures early, allowing material to drain outward and sometimes creating the impression that the problem is limited to the outer ear. The timeline and severity vary widely between individuals, and some animals show little outward change until inflammation begins to affect structures beyond the middle ear itself.
Signals & patterns
Early signals
Persistent head shaking
The dog or cat may shake their head more frequently or more vigorously than during previous episodes of ear discomfort, sometimes without obvious visible discharge. This can reflect irritation or pressure changes within the middle ear that do not produce the same outward signs as outer ear inflammation.
Reluctance to be touched near the ear
An animal that previously tolerated ear handling may begin to pull away, flatten the ears, or show discomfort when the area around the base of the ear is approached. This can indicate deeper pain that is not always apparent from the outside.
Odour or discharge not improving
In cases where outer ear treatment has been ongoing, a persistent smell or discharge that does not respond as expected may suggest that inflammation has extended beyond the external canal. The quality of the discharge may remain similar, but the pattern of response changes.
Subtle change in ear carriage
One ear may be held slightly lower or at a different angle, or the animal may tilt the head very gently to one side. These shifts can be easy to miss, particularly in the early stages when the tilt may be intermittent or mild.
Later signals
Pronounced head tilt
A more obvious tilt, where the affected ear is held lower and the head position becomes persistent, can develop as inflammation within the middle ear increases or as nearby structures become involved. The tilt may worsen over days to weeks if the condition progresses.
Difficulty chewing or yawning
Some animals show reluctance to open the mouth fully, chew on one side, or appear uncomfortable when yawning. This occurs because the jaw joint sits very close to the middle ear, and inflammation in this area can make normal jaw movement painful.
Changes in balance or coordination
The dog or cat may seem unsteady, particularly when turning or navigating steps, or may circle toward the affected side. These patterns can emerge when inflammation affects the structures involved in maintaining balance, which sit adjacent to the middle ear.
Facial asymmetry or drooping
In some cases, one side of the face may appear different — an eyelid may not close fully, the lip may droop, or the nostril may seem less mobile. This occurs when inflammation affects a nerve that runs through the middle ear and controls facial movement on that side.
Click to read about the biological mechanisms
How this is usually investigated
Options & trade-offs
Last reviewed: Invalid Date ·