What Causes Vestibular Disease in Cats?

Vestibular disease in cats affects the balance center in a cat’s inner ear and brain and can make them appear dizzy, stumble, or even fall over. Signs of vestibular disease in cats may include head tilt, circling, abnormal eye movements, and nausea. Known causes range from ear infections and brain conditions to toxins, but in some cases, the cause is not known.

Causes of Vestibular Disease in Cats¹

Vestibular disease can be caused by issues affecting your cat’s ears or head (peripheral vestibular disease) or affecting the brain itself (central vestibular disease). Let’s take a more in-depth look at what causes vestibular disease in cats.

Peripheral Vestibular Disease^1,2

This is the most common form and is often related to problems outside the brain:

• Middle or inner ear infections (otitis media/interna). Bacterial infections are one of the leading causes, often spreading from untreated outer ear infections. These infections can damage delicate balance structures inside the ear.
• Polyps. Benign growths, often in young cats, can form in the middle ear or nasal passages and block or irritate balance-related nerves.
• Ear canal tumors. Some cancers start in the ear canal or middle ear, interfering with normal balance signals.
• Head trauma. A blow to the head, especially involving the side of the skull near the ear, can cause vestibular problems.
• Congenital conditions. Rarely, kittens are born with developmental issues in their inner ear, causing early-onset vestibular signs.
• Medication or toxin exposure. Certain antibiotics (such as aminoglycosides) and some ear-cleaning solutions can damage the inner ear if used incorrectly, especially when the eardrum is ruptured.

Central Vestibular Disease¹

This involves damage within the brain itself, often in the brain stem or cerebellum:

• Brain tumors. Growths in or near balance-control centers of the brain, more common in older cats, can disrupt coordination and posture.
• Strokes (ischemic infarcts). Reduced blood flow to brain tissue can cause sudden balance loss and ataxia cat symptoms.
• Inflammation or infections. Diseases like feline infectious peritonitis (FIP) can target the brain and lead to vestibular signs.
• Nutritional deficiencies. A lack of thiamine (vitamin B1), often linked to poor diets or feeding all meat or raw fish diets, can trigger severe neurologic symptoms, including vestibular issues.
• Head injuries. More severe trauma involving the brain may result in central vestibular disease.

Idiopathic Vestibular Disease¹

Sometimes, no clear cause is found. This is called idiopathic vestibular disease. In cats, it is common at any age. It appears suddenly, causes dramatic symptoms (e.g., head tilt, circling, falling), but often improves on its own within a few days to weeks.

How Is Vestibular Disease in Cats Diagnosed?¹  

Because vestibular disease symptoms, such as falling, circling, and abnormal eye movements, can look similar to other serious medical conditions, your veterinarian will work to determine what is causing your cat’s loss of balance.

Medical History and Physical Examination

Your veterinarian will start by asking questions about your cat’s symptoms, such as when they began, whether they have changed or worsened, and if there has been any recent ear infection, trauma ,or possible toxin exposure. A complete physical examination follows, looking for external signs of ear disease, including redness, swelling, or discharge, and checking your cat’s overall health.

Neurologic Examination

A neurologic exam helps determine whether the issue lies in the ear or within the brain. Your veterinarian will evaluate your cat’s head position and posture, observe for abnormal eye movements called nystagmus, and assess your cat’s ability to walk, turn, and maintain balance. They will also check reflexes and responses to touch on the face and body to look for other nerve problems.

Ear and Imaging Tests

Ear cytology and culture can help detect bacterial or yeast infections. To look deeper into ear-related problems, your veterinarian may recommend an ear examination under sedation or anesthesia, which allows a safe and pain-free look at the deeper ear canal and eardrum. X-rays may be used for an initial look at the middle and inner ear.

Laboratory Tests

Bloodwork is often recommended to look for underlying health issues that could contribute to neurologic signs. This may include:

• A complete blood count to evaluate overall health and detect infection or inflammation.
• A chemistry profile to assess organ function, especially the liver and kidneys.
• Specific nutrient testing, such as thiamine (vitamin B1) levels, when dietary deficiencies are suspected.

Specialty Referral

In some cases, your veterinarian may recommend referral to a specialty hospital, where advanced equipment and veterinary neurologists can provide more detailed testing and treatment planning. Advanced imaging, such as computed tomography (CT) or magnetic resonance imaging (MRI) scans, may be recommended to view the inner ear, skull, and brain for infection, inflammation, polyps, or tumors.

In some cases, your veterinarian may recommend collecting cerebrospinal fluid (CSF) to check for infections, inflammation, or certain cancers that affect the brain and spinal cord. This test is usually performed at a specialty hospital under general anesthesia because it requires precision and specialized equipment. CSF testing is particularly helpful when brain inflammation, infectious disease, or certain immune-mediated conditions are suspected. Results can guide treatment choices and help predict recovery.

Why Diagnosis Matters

Finding the cause is important because it guides treatment and helps determine how serious the condition is. Idiopathic vestibular disease often resolves on its own, but other causes, such as ear infections, tumors, or brain disease, require specific and sometimes urgent treatment. Learn more about the different treatments for vestibular disease in cats.

For more expert tips on cat health, explore our other cat symptom articles.

References

1. Rossmeisl JH Jr. Vestibular disease in dogs and cats. Vet Clin North Am Small Anim Pract. 2010;40(1):81-100.