Facial Nerve Paralysis in Cats (Facial Paresis)

  • Occurrence: rarer
  • Location of disease: Head/Neck
Author: Dr. med. vet. Gisa Löwe | Last modified: 07.07.2026
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When to visit the vet?

Non-urgent see a veterinarian within 2–3 days

?

If the condition worsens / symptoms persist, consult a veterinarian.

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Definition

Facial nerve paresis in cats is a neurological condition characterized by Paralysis or weakness of the muscles on one or both sides of the face. This condition results from a dysfunction of the seventh cranial nerve, the facial nerve, which is responsible for facial motor function.

The most important facts at a glance

Facial nerve paresis in cats is a condition in which the seventh cranial nerve, responsible for facial muscles, is damaged or impaired. This can be triggered by Inflammatory conditions, infections, traumas, Tumors, or unknown causes. Common symptoms include difficulty eating, a drooping face, asymmetrical facial features, and problems blinking. In severe cases, Facial spasms and increased salivation may also occur.

Diagnosis is made through a thorough clinical examination and possibly imaging techniques such as X-ray or MRI to identify structural problems. Blood tests can help rule out systemic diseases. Treatment depends on the cause and may include antibiotics, antiviral medications, or anti-inflammatory agents. In some cases, surgical intervention is necessary.

The prognosis depends heavily on the cause and severity. For treatable causes, full recovery is often possible, while for Tumors or severe infections, the outlook may be worse. Preventive measures include protecting the cat from injuries and infections, regular veterinary examinations, and a stress-free environment. A balanced diet and sufficient exercise can also contribute to overall health and reduce the risk of nerve problems.

Causes

The facial nerve is the seventh cranial nerve and plays a crucial role in controlling the muscles that enable facial expressions, blinking, and other movements in the face. This nerve runs from the base of the brain through the facial canal and ends in several branches that supply the various facial muscles. Damage or dysfunction of this nerve can lead to paresis.

The causes of facial nerve paresis in cats can be diverse. One of the most common causes is inflammation of the nerve, which can be triggered by an infection, traumas, or a systemic disease. Infectious diseases such as feline herpesviruses or bacterial infections can also play a role. Furthermore, Tumors that compress the nerve, as well as autoimmune diseases or idiopathic causes (without an identifiable cause), can lead to Paralysis.

Traumatic injuries, such as those caused by an accident or a severe blow to the head, are another possible cause. Such injuries can directly damage the facial nerve or lead to Swelling that compresses the nerve. In rare cases, a middle ear infection that spreads to the facial nerve can also lead to paresis.

Symptoms

Rare symptoms:

The symptoms of facial nerve paresis in cats are often easy to recognize as they affect the face and facial expressions. Common signs include a drooping lip or ear on the affected side, difficulty blinking, or incomplete eyelid closure, which can lead to a dry eye.

Cats with this condition may also show difficulty eating or drinking, as the facial muscles play a role in coordinating these activities. In some cases, drooling may occur on the affected side. Other symptoms may include retraction of the third eyelid or changes in facial expression.

Symptoms can occur unilaterally or bilaterally, with unilateral paresis being more common. In cases of bilateral paresis, symptoms can be more severe and significantly impair the cat’s quality of life.

Diagnosis

The diagnosis of facial nerve paresis in cats requires a thorough clinical examination and a detailed medical history. The veterinarian will examine the facial muscles for Paralysis or asymmetry and check how the cat responds to various stimuli to assess the function of the facial nerve.

In addition to the physical examination, imaging procedures such as X-rays or magnetic resonance imaging (MRI) can be used to identify structural anomalies or Lesions in the area of the head and the facial nerve. In some cases, electromyography (EMG) may also be performed to measure the electrical activity of the facial muscles.

A blood test can also be helpful to rule out systemic diseases or infections that could contribute to paresis. If a middle ear infection is suspected, an examination of the ear canal may be indicated.

Therapy

The treatment for facial nerve paresis in cats depends on the underlying cause. In cases where an infection is present, antibiotics or antiviral medications may be prescribed. Anti-inflammatory medications, such as corticosteroids, can also be used to reduce Swelling of the nerve and alleviate symptoms.

For cats with idiopathic paresis, where no specific cause is found, symptomatic treatment may be considered. This can include the use of eye drops to protect the eye from drying out, as well as physical therapy measures to promote muscle activity.

In severe cases where a Tumor or another structural anomaly is detected, surgical intervention may be necessary. The prognosis in such cases depends on the type and progression of the underlying condition.

Prognosis and follow-up care

The prognosis for cats with facial nerve paresis varies greatly and depends on the cause and severity of the condition. In many cases, especially if the cause is treatable, symptoms may improve or resolve completely over time.

In idiopathic cases, where no specific cause is found, the prognosis is often good, and many cats recover spontaneously within weeks to months. However, if a tumor or a severe infection is the cause, the prognosis may be poorer and may require more aggressive treatment.

Prevention

To minimize the risk of facial nerve paresis in cats, pet owners should take care to protect their pets from injuries and infections. Regular health monitoring by a veterinarian can help detect early signs of disease and treat them in a timely manner. Vaccinations should be kept up to date to prevent infections that could potentially affect the facial nerve.

Otherwise, it is important to make the cat’s environment safe to avoid injuries. This includes eliminating dangerous objects or narrow spaces where the cat could get stuck or injured. A balanced diet and sufficient exercise strengthen the immune system and contribute to the cat’s overall health, which can indirectly reduce the risk of nerve problems.

Stress can also be a factor that affects the health of cats. A stress-free environment with sufficient retreat options and a stable social environment can promote the cat’s well-being. Finally, pet owners should not hesitate to seek veterinary advice if they notice signs of discomfort or Behavioral changes, in order to take preventive measures and detect possible nerve damage early.

Outlook on current research

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Facial nerve paresis in cats is usually not an independent primary disease, but a neurological syndrome with various causes. Current knowledge suggests that middle and inner ear diseases, nasopharyngeal polyps, traumas, and Tumors in the area of the tympanic bullae are particularly important for differential diagnosis. In veterinary reference literature, otitis media is considered a common cause, and a large multicenter study from 2025 on peripheral vestibular syndrome showed that otitis media/interna was the most common cause and that facial paresis was significantly associated with this diagnosis.

The most important research focus is therefore on earlier and more precise cause clarification. In the future, CT and MRI, targeted otoscopy or video-otoscopy, and the structured evaluation of accompanying findings such as Horner’s syndrome, vestibular signs, or middle ear changes will gain importance. This is clinically relevant because facial paresis can be caused not only by inflammatory ear diseases but also by rare neoplastic processes in the middle ear. Furthermore, a recent case report suggests that systemic hypertension may have been previously underestimated as a cause or contributing factor in individual cats.

The realistic research outlook is therefore cautious but practical: the greatest progress in the coming years is expected in standardized diagnostic algorithms, the clear separation of idiopathic from secondary cases, and earlier imaging of the middle ear and facial nerve path, rather than a single new medication. Precisely because feline evidence continues to rely heavily on retrospectives and case reports, multicenter registries and prospective follow-up studies will be particularly important.

Frequently Asked Questions (FAQs)

1. What is facial paresis in cats?
Facial paresis is a weakness or Paralysis of the facial muscles due to damage to the 7th cranial nerve (facial nerve), which can occur on one or both sides.
2. What symptoms do affected cats show?
Drooping ear and lip, incomplete eyelid closure (lagophthalmos), drooling, and loss of food while chewing on the affected side.
3. What are common causes?
Middle ear infections, Tumors, traumas, idiopathic facial paresis (similar to Bell's palsy), and polyneuropathies.
4. How is the diagnosis made?
Neurological examination, ear examination, imaging (CT/MRI) of the skull and middle ear, and blood tests.
5. What treatment is possible?
Treatment of the underlying cause (antibiotics for otitis media, tumor therapy). Corneal protection with eye ointments for lagophthalmos.
6. Can a cat recover from facial paresis?
In cases of idiopathic facial paresis, many cats recover spontaneously within weeks to months.
7. Does the affected eye require special care?
Yes, the eye must be regularly moisturized and checked for corneal damage, as the lack of blinking leads to drying out.
8. Can the eye be permanently damaged by the paralysis?
Yes, persistent lagophthalmos leads to corneal drying, ulcers, and, if neglected, permanent corneal scarring. Regular eye drops are absolutely necessary.
9. How common is facial paresis in cats?
Facial paresis is less common in cats than in dogs, but it occurs in the context of middle ear diseases and traumas.
10. What is the prognosis?
In the idiopathic form, the prognosis with spontaneous recovery is good. Structural causes such as Tumors have a more guarded prognosis.

Literature

Platt, Simon; Garosi, Laurent. Small Animal Neurological Emergencies. 1. Ausgabe, Manson Publishing, 2012.
Dewey, Curtis W.; da Costa, Ronaldo C. Practical Guide to Canine and Feline Neurology. 3. Ausgabe, Wiley-Blackwell, 2015.
Chrisman, Cheryl L. Disorders of the Peripheral Nervous System. In: Braund, Kyle G. Clinical Neurology in Small Animals: Localization, Diagnosis and Treatment. IVIS, 2003.
Podell, Michael. Neurological Emergencies. Veterinary Clinics: Small Animal Practice, 1996.
Simpson, Kenneth M.; Mariani, Christopher L. Peripheral Nerve Disorders. In: Dewey, Curtis W. A Practical Guide to Canine and Feline Neurology. 2. Ausgabe, Wiley-Blackwell, 2008.