Lyme Disease and Sudden Hearing Loss: Signs of Lyme Meningitis

Lyme disease sudden hearing loss can appear months or even a year after a tick bite. In one case report, a woman in her 40s developed sudden bilateral sensorineural hearing loss, tinnitus, and rapidly progressive facial palsy. Only after careful questioning did she recall removing a tick from her ear canal one year earlier.

This case highlights an important diagnostic challenge. Symptoms of neurologic Lyme disease can appear long after the initial infection. When clinicians fail to ask about past tick exposure, the connection between hearing loss, facial palsy, and Lyme meningitis may be missed.

Sudden Hearing Loss From Lyme Disease

In their article “Lyme neuroborreliosis as a cause of sudden sensorineural hearing loss and facial palsy,” Nitro and colleagues describe a woman in her 40s who developed sudden loss of hearing in both ears along with facial palsy and was later diagnosed with Lyme meningitis.

“Bilateral hearing loss is rare,” the authors point out.

Sudden sensorineural hearing loss affecting both ears simultaneously is uncommon. When it occurs together with facial palsy, the differential diagnosis narrows significantly. Lyme disease may not be considered unless tick exposure is identified during the medical history.

The Emergency Presentation

The patient was admitted to the emergency department reporting hearing loss in both ears and tinnitus. Her symptoms had been ongoing for three days. She also complained of dizziness, neck pain, and stiffness.

She was admitted overnight for observation and received oral amoxicillin/clavulanate for a possible ear infection.

“During the night, a new urgent neurological consult was requested following sudden right facial palsy,” the authors wrote.

The clinical picture worsened rapidly. Bilateral hearing loss, tinnitus, dizziness, and neck stiffness were already concerning. When facial palsy developed overnight, it signaled involvement of multiple cranial nerves — a hallmark of neurologic Lyme disease.

Rapidly Progressive Neurologic Symptoms

The patient with neuroborreliosis presented with sudden sensorineural hearing loss and rapidly progressive facial palsy.

The patient was started on intravenous methylprednisolone, valaciclovir, and intravenous ceftriaxone.

Over the next two days, her neck pain improved but her hearing loss and facial palsy did not improve.

The treatment addressed multiple possibilities: steroids for inflammatory hearing loss, valaciclovir for viral causes such as Ramsay Hunt syndrome, and ceftriaxone for bacterial infection. The improvement in neck pain suggested that meningeal inflammation was responding to treatment, although cranial nerve deficits persisted.

Lyme Meningitis Diagnosed One Year After Tick Bite

Upon further questioning, the patient recalled removing a tick from her right ear canal one year earlier.

Tests were positive for Lyme disease, and MRI findings suggested Lyme meningitis with involvement of multiple cranial nerves.

This moment was critical to the diagnosis. Without asking about prior tick exposure, the connection to Lyme disease may have been missed. The tick removal from the ear canal — on the same side as the facial palsy — provided a key diagnostic clue.

The MRI findings confirmed neuroborreliosis affecting multiple cranial nerves:

• Cranial nerve VII (facial palsy)
• Cranial nerve VIII (hearing loss and balance symptoms)

Complete Resolution With Treatment

The woman was treated successfully with intravenous steroids and ceftriaxone.

“At the end of therapy, the patient showed a complete resolution of the meningeal inflammation, facial palsy, and sensorineural hearing loss.”

The full recovery of both hearing loss and facial palsy suggests that the neurologic deficits were caused by infection-related inflammation rather than permanent nerve damage.

This is notable because sudden sensorineural hearing loss from viral or vascular causes often leads to permanent deficits. In contrast, Lyme-related cranial neuropathy may be reversible when treated appropriately.

The Diagnostic Challenge

“The most challenging feature of this case was identifying a diagnostic connection between sudden sensorineural hearing loss and rapidly progressive unilateral facial palsy.”

This combination is rare. Sudden hearing loss alone has many possible causes including viral infection, vascular ischemia, autoimmune disease, or acoustic neuroma.

Facial palsy alone commonly suggests Bell’s palsy or Ramsay Hunt syndrome.

However, when both symptoms occur together — particularly with meningeal signs — clinicians should consider infectious meningitis involving the cranial nerves.

Authors’ Takeaways

• “This case report highlights the importance of collecting a complete medical history in all cases of facial palsy and sudden hearing loss while presenting an infrequent clinical presentation of early disseminated Lyme disease with neuroborreliosis.”
• “…no literature reports association or correlation between sudden sensorineural hearing loss and facial palsy except for one case report in which they were described after a tick bite.”
• “One of the most peculiar features of neuroborreliosis can manifest up to one year after a disseminated infection, as in this case report.”

Why Symptoms Appeared One Year Later

The one-year delay between tick bite and neurologic symptoms reflects early disseminated Lyme disease.

After the initial infection, Borrelia spirochetes can spread throughout the body and persist in tissues — including the central nervous system — for months before causing symptoms.

Several factors may contribute to delayed symptom onset:

• Immune suppression: stress or illness may weaken immune control of infection
• Spirochetal replication: bacterial levels increase and trigger inflammation
• Gradual central nervous system invasion: organisms slowly infiltrate meninges and cranial nerves
• Delayed immune response: inflammatory reactions develop months after infection

This delayed presentation underscores why clinicians should ask about tick exposure within the past year when evaluating unexplained neurologic symptoms.

Clinical Perspective

This case illustrates several important clinical points.

First, neurologic Lyme disease can appear months or even years after the initial tick bite.

Second, bilateral hearing loss is unusual and often suggests systemic disease rather than a localized ear disorder.

Third, rapid progression from hearing loss to facial palsy indicates aggressive neurologic involvement requiring urgent treatment.

Fourth, neck pain and stiffness were signs of meningeal inflammation, raising suspicion for infectious meningitis.

Finally, the complete recovery of hearing and facial nerve function demonstrates that Lyme-associated neurologic deficits may be reversible when treated appropriately.

Frequently Asked Questions

Can Lyme disease cause sudden hearing loss?

Yes. Lyme disease can affect the eighth cranial nerve, causing sensorineural hearing loss. In this case, the patient experienced bilateral hearing loss that resolved after treatment.

How long after a tick bite can hearing loss occur?

Neurologic symptoms may appear months or even a year after tick exposure as Lyme disease spreads to the nervous system.

Can Lyme-related hearing loss be reversed?

Yes. When caused by inflammation from infection, hearing loss may improve or resolve with appropriate antibiotic therapy.

Why are facial palsy and hearing loss connected?

Both symptoms involve cranial nerve inflammation. Facial palsy affects cranial nerve VII, while hearing loss involves cranial nerve VIII.

Should patients with sudden hearing loss be asked about tick exposure?

Yes. A detailed medical history including possible tick exposure within the past year can help identify cases of neurologic Lyme disease.

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Dr. Daniel Cameron, MD, MPH
Lyme disease clinician with over 30 years of experience and past president of ILADS.

Symptoms • Testing • Coinfections • Recovery • Pediatric • Prevention