Facial Palsy in Children: Could It Be Lyme Disease?
Facial weakness can appear suddenly
Bell’s palsy is common—but not the only cause
Tick bite or rash may be absent
Lyme disease is often missed
Facial palsy in children may be caused by Lyme disease—especially in endemic regions during summer and fall. Although Bell’s palsy is common, Lyme-related facial palsy should be considered when facial weakness follows outdoor exposure or a recent systemic illness. :contentReference[oaicite:0]{index=0}
Because many children do not recall a tick bite or rash, the diagnosis may be missed if clinicians rely too heavily on those features alone.
For a broader overview, see the Pediatric Lyme Disease guide.
What Parents May Notice First
Facial palsy in children often appears suddenly. Parents may notice:
- Uneven smile
- Drooping on one side of the face
- Difficulty closing one eye
- Drooling or trouble holding liquids in the mouth
- Slightly slurred speech
Although alarming, this is usually not a stroke—but it does require prompt evaluation.
Bell’s Palsy vs Lyme Disease
Acute facial weakness is often labeled as Bell’s palsy.
However, Bell’s palsy is a diagnosis of exclusion. Lyme disease is one of the most important infectious causes that can present the same way.
In a pediatric study from a Lyme-endemic region:
- 27% had Lyme-related facial palsy
- 68% had Bell’s palsy
This overlap makes Lyme disease an essential part of the differential diagnosis.
When Lyme Disease Is More Likely
Clinical clues that favor Lyme disease include:
- Late spring through fall presentation
- Recent fever, headache, or fatigue
- Outdoor exposure in a tick-endemic region
- No recent upper respiratory infection
In one study, 93% of Lyme-related cases occurred between June and November.
Tick Bite and Rash Are Often Missing
Many families expect a known tick bite or rash.
However, these are frequently absent.
- Only ~30% had a rash
- Few recalled a tick bite
The absence of these findings does not rule out Lyme disease.
See also Only a minority of children recall a tick bite.
Facial Palsy May Be the First Sign
Facial palsy may be the first recognizable manifestation of Lyme disease.
Children may also develop:
- Headache
- Neck stiffness
- Light sensitivity
- Fatigue
In rare cases, both sides of the face may be affected—an important clue for infection.
The Role of Corticosteroids
Corticosteroids are commonly used for Bell’s palsy.
However, their role in Lyme-related facial palsy is uncertain.
Some studies suggest steroids may be associated with worse outcomes in Lyme-related cases.
When Lyme disease is suspected, treatment decisions should be individualized.
Do Imaging or Lumbar Puncture Help?
In isolated facial palsy:
- Imaging is usually not necessary
- Lumbar puncture is not routinely required
These tests are reserved for atypical or more complex presentations.
Most Children Recover
The prognosis is generally reassuring.
Most children recover fully—whether the cause is Bell’s palsy or Lyme disease.
When to Suspect Lyme Disease
Consider Lyme disease when a child with facial palsy:
- Lives in or visited an endemic area
- Presents in late spring, summer, or fall
- Has recent systemic symptoms
- Lacks another clear explanation
For a broader guide, see When to suspect Lyme disease in children.
Clinical Perspective
Lyme disease should remain on the differential whenever a child presents with facial palsy in an endemic region.
Seasonality, exposure history, and preceding symptoms often provide the most important diagnostic clues.
Clinical Takeaway
Facial palsy in children may be Lyme disease—even without a known tick bite or rash.
Early recognition can guide appropriate testing and treatment.
When in doubt, Lyme disease should be considered.
Reference
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
