Labyrinthitis

What is labyrinthitis?

Labyrinthitis is the inflammation of part of the inner ear called the labyrinth. The eighth cranial nerve may also be inflamed. The inflammation of these causes vertigo, hearing loss, and other symptoms. In most people, these symptoms go away over time. It is not a common condition. It usually only affects one ear.

The inner ear has a system of fluid-filled tubes and sacs called the labyrinth. Inside the inner ear, the cochlea gathers information about sound. The vestibular organs gather information about motion and changes in space. These contribute to a sense of balance. The eighth cranial nerve (vestibulocochlear nerve) sends all of this information from the inner ear to the brain.

When one of the nerves or the labyrinth is infected, it can become inflamed and irritated. This can cause it to not work normally. It may cause hearing loss in one ear. The brain now has to make sense of the information that doesn’t match between the normal nerve and the infected one. This causes a feeling that the world is spinning around you (vertigo).

What causes labyrinthitis?

A viral infection of the vestibulocochlear nerve or labyrinth may cause the condition. The virus may have spread throughout your body. Or it may only affect the eighth cranial nerve and labyrinth. Usually, only one nerve is affected. Viruses known to cause labyrinthitis include:

  • Herpes viruses
  • Influenza
  • Measles
  • Mumps
  • Rubella
  • Polio
  • Hepatitis
  • Epstein-Barr
  • Varicella

Bacterial infections of the middle ear are fairly common in children. In rare cases, an infection in the middle part of the ear can spread to the inner ear and cause labyrinthitis. This is more of a risk with middle-ear infections that are chronic and not treated. In rare cases, bacterial meningitis or head trauma may cause labyrinthitis. In other cases, the cause of labyrinthitis is not known. 8.8

What are the risks for labyrinthitis?

Having a viral infection that can cause labyrinthitis increases your risk. Your child’s risk may increase if he or she hasn’t had the recommended vaccines.

What are the symptoms of labyrinthitis?

Symptoms of labyrinthitis of may include:

  • A feeling of spinning (vertigo)
  • Dizziness
  • Lack of balance when walking
  • Nausea and vomiting
  • Impaired concentration
  • Periods of uncontrolled, back-and-forth eye movements (nystagmus)
  • Hearing loss
  • Ringing in the ears

Your symptoms might range from mild to severe. They may come on very quickly. In many people, these symptoms go away over several weeks. Others have symptoms that last longer.

A related syndrome is called vestibular neuritis. It causes similar symptoms. But it does not cause hearing problems. It affects only the vestibular portion of the labyrinth and nerve.

Labyrinthitis does not cause neurological symptoms. These may include severe headache, speech problems, or loss of limb movement.

How is labyrinthitis diagnosed?

Your health care provider will ask about your medical history. You may also have a physical exam. This may include hearing and balance tests. It will also include an exam of your nervous system. Many neurological and other health conditions can cause dizziness and vertigo. Your health care provider may need to rule these out.

There are no tests for labyrinthitis. But your health care provider may have you take an imaging test. These can help to rule out other causes of your symptoms, such as stroke.

You may have tests such as:

  • Magnetic resonance imaging (MRI), to rule out stroke
  • Electrocardiogram (ECG) or other cardiovascular tests, to rule out cardiovascular causes
  • Electronystagmography (ENG) or videonystagmography (VNG), which record your eye movement to find the specific location of the problem in your vestibular system and evaluate the cause of your balance disorder

How is labyrinthitis treated?

Your health care provider will figure out the best treatment for you based on:

  • How old you are
  • Your overall health and medical history
  • How sick you are
  • How well you can handle specific medications, procedures, or therapies
  • How long the condition is expected to last
  • Your opinion or preference

Immediate treatment for labyrinthitis might include:

  • Corticosteroids (to help reduce inflammation of the nerve)
  • Antiviral drugs
  • Antibiotics (if there are signs of a bacterial infection)
  • Drugs to take for a short time that control nausea and dizziness, such as diphenhydramine and lorazepam

If your symptoms go away within a few weeks, you likely won’t need other treatment. If you have symptoms that don’t go away, you may need to do certain exercises. These are known as vestibular rehabilitation exercises. They are a form of physical therapy. These exercises may help your brain learn to adjust to the vestibular imbalance.

What are the complications of labyrinthitis?

Usually, labyrinthitis does not cause any complications. Rarely, labyrinthitis permanently damages your eighth cranial nerve. This can cause lasting problems with balance, and partial or total loss of your hearing. This might require you to use a hearing aid. Be sure to get prompt treatment to help reduce your risk for these complications.

When should I call my health care provider?

Call your health care provider if your symptoms do not begin to go away after a few days of treatment. Also, call your health care provider if you experience additional symptoms, like difficulty moving an arm or a leg.

Key points

Labyrinthitis usually results from a viral infection of the eighth cranial nerve or labyrinth. This causes sudden vertigo, hearing loss, and other symptoms, which are usually only temporary.

  • Your health care provider will need to rule out other, more dangerous causes of vertigo, like stroke.
  • You might need treatment with corticosteroids, antiviral medications, or other medications to treat the symptoms of labyrinthitis.
  • Labyrinthitis can rarely cause permanent hearing loss and persistent vertigo.
  • Some people need vestibular therapy to treat chronic symptoms.

Next steps

Tips to help you get the most from a visit to your health care provider:

  • Before your visit, write down questions you want answered.
  • Bring someone with you to help you ask questions and remember what your provider tells you.
  • At the visit, write down the names of new medicines, treatments, or tests, and any new instructions your provider gives you.
  • If you have a follow-up appointment, write down the date, time, and purpose for that visit.
  • Know how you can contact your provider if you have questions.
Online Medical Reviewer: Dozier, Tennille, RN, BSN, RDMS
Online Medical Reviewer: Kacker, Ashutosh, MD
Last Review Date: 10/1/2016
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