TL;DR: Facial drooping in cats is often a sign of facial nerve paralysis that requires a veterinary exam within 24–48 hours, though immediate emergency care is needed if it is accompanied by a head tilt or difficulty walking.
What should I know if my cat has facial drooping?
When one side of a cat's face appears to sag, it is typically a sign of facial nerve paralysis. This condition affects the muscles that control the eyelids, ears, and lips. Common clinical signs and causes include:
- Symptoms: An inability to blink, an ear that hangs low, or a slack lip on one side of the face.
- Common causes: Middle or inner ear infections, physical trauma, polyps, or idiopathic facial nerve paralysis (which occurs without a known cause).
Is facial drooping in cats a veterinary emergency?
The urgency level for a drooping face is categorized as Medium. While the drooping itself is rarely life-threatening, it is often a symptom of an underlying medical issue that requires professional diagnosis. You should schedule a veterinary appointment within 24 to 48 hours. However, seek emergency care immediately if the facial droop is accompanied by:
- A head tilt
- Difficulty walking or loss of balance
- Sudden loss of vision
How does taking a photo or video of my cat help with triage?
Capturing a clear photo or video of your cat's face at home is an invaluable tool for your veterinary team for several reasons:
- Reduces stress bias: Cats often hide symptoms or hold their heads differently due to the stress of being at a clinic.
- Provides a baseline: Media taken in a relaxed environment shows the true extent of the facial asymmetry.
- Tracks progression: It helps the veterinarian determine the severity of nerve involvement and how quickly the condition is advancing.
Clinical Context (Merck Veterinary Manual)
Idiopathic facial paralysis is a common disorder in dogs and cats, with domestic longhaired cats at increased risk, resulting in unilateral or bilateral paresis or paralysis of the facial muscles. Clinical signs include acute onset of inability to blink, drooping ear, drooping upper lip, and drooling from the corner of the mouth. A lowered eyelid often develops on the affected side, as well as lack of a menace response. Facial sensation, mediated via the trigeminal nerve, remains intact. Differential diagnoses include ear disease, trauma, and brain-stem lesions. A drooping ear can also result from injuries to the proximal aspect of the nerve.
Chapter: Neurology
Source: The Merck Veterinary Manual, 11th Edition (Page 1239)