TL;DR: Pus draining from a cat's ear signifies a painful infection that requires veterinary attention within 24 to 48 hours, or immediate care if neurological signs like stumbling occur.
What does it mean if there is pus draining from my cat's ear canal?
When you see thick, opaque discharge—often yellow, white, or green—draining from your cat's ear, it is known as purulent exudate or pus. This is a clear sign that the body is fighting a significant bacterial or yeast infection, often referred to as otitis externa or otitis media. In some cases, this drainage occurs because an underlying infection has caused the eardrum to rupture, or because of a deep abscess or inflammatory polyp within the canal.
Is pus draining from my cat's ear considered a veterinary emergency?
- The urgency level for pus draining from a cat's ear is Medium; while not usually life-threatening in the immediate hour, it requires veterinary intervention within 24 to 48 hours.
- Seek immediate emergency care if your cat exhibits neurological signs such as a severe head tilt, stumbling, or involuntary eye movements.
- These symptoms suggest the infection has progressed to the inner ear and is affecting your pet's balance.
How can taking a photo of the ear discharge help with my cat's triage?
- Capturing a clear, well-lit photo of the ear and discharge allows the veterinary team to assess color, texture, and volume.
- A photo provides visual evidence of the inflammation's severity without having to immediately disturb the painful ear.
- Providing this image helps the clinic prioritize your cat's appointment based on the visible symptoms.
Clinical Context (Merck Veterinary Manual)
In cats, purulent ear discharge suggests otitis externa or media/interna. Clinical signs include discharge, odor, and sensitivity of the face and ear, potentially accompanied by head shaking, rubbing or scratching of the affected ear, and head tilting. The external ear canal may appear inflamed with abnormal discharge. Collect samples for cytologic evaluation and culture before flushing the ear canal. Perform skin cytology from the external and inner pinnae, cytology of any exudates, hair trichograms and skin scrapings for Demodex, and ear swab cytology with mineral oil. Animals with otitis media may exhibit signs of facial nerve paralysis or Horner syndrome.
Chapter: Dermatology, ENT
Source: The Merck Veterinary Manual, 11th Edition (Page 1834)