Can Lyme Disease Cause a Stroke?
Stroke from Lyme is rare
Inflammation can affect brain vessels
Symptoms may mimic other conditions
Diagnosis is often delayed
Can Lyme disease cause a stroke? In rare cases, Lyme disease can trigger inflammation in the brain’s blood vessels, leading to stroke-like symptoms or even an ischemic stroke.
This is uncommon—but important—especially when symptoms do not follow a typical pattern.
In these situations, neurologic Lyme disease may present in unexpected and serious ways.
Lyme disease can also mimic other neurologic conditions. For more, see Lyme disease mimics neurologic disorders.
When Lyme Disease Affects the Brain’s Blood Vessels
Lyme disease, caused by Borrelia burgdorferi, is best known for joint pain, fatigue, and neurologic symptoms. But in rare cases, it can lead to neuroborreliosis-associated vasculitis—inflammation of blood vessels in the brain.
This inflammation can reduce blood flow, increasing the risk of:
- Ischemic stroke
- Transient ischemic attacks (TIAs)
- Focal neurologic deficits
These presentations may be mistaken for primary neurologic or vascular disorders.
A Case That Challenges Expectations
A published case described a 13-year-old patient who developed an acute ischemic stroke linked to Lyme neuroborreliosis.
This case is notable because:
- Stroke occurred in a young patient without typical risk factors
- Symptoms did not initially suggest Lyme disease
- Diagnosis required consideration of infection-related inflammation
This type of presentation highlights how Lyme disease can fall outside expected diagnostic patterns.
Why Lyme Disease Stroke Risk Is Often Missed
Stroke is not commonly associated with Lyme disease.
As a result, clinicians may initially consider:
- Primary vascular causes
- Autoimmune conditions
- Other neurologic disorders
Challenges include:
- Overlapping symptoms
- Negative or inconclusive early Lyme testing
- Limited awareness of vascular complications
This contributes to delayed Lyme disease diagnosis, especially in atypical cases.
Stroke-Like Symptoms That May Overlap With Lyme Disease
Neurologic Lyme disease can produce symptoms similar to stroke, including:
- Sudden weakness or numbness
- Difficulty speaking
- Facial drooping
- Dizziness or imbalance
Unlike most strokes, Lyme-related symptoms may fluctuate or evolve over time.
For broader symptom patterns, see Lyme disease symptoms guide.
This variability is explored further in why Lyme symptoms change every day.
When symptoms do not follow a typical pattern—especially in younger patients—Lyme disease should be considered.
Rare—but Important to Recognize
Lyme-associated stroke is uncommon, but recognizing it matters—particularly in:
- Younger patients with unexplained stroke
- Individuals with neurologic symptoms and possible tick exposure
- Cases where standard evaluations are inconclusive
This is rare—but important when standard explanations fall short.
What This Means for Patients
Most people with Lyme disease will never experience a stroke.
However, Lyme disease does not always follow a predictable pattern.
When symptoms are unusual, persistent, or unexplained, a broader clinical perspective may be needed.
Clinical Takeaway
Can Lyme disease cause a stroke? Yes—but rarely.
In select cases, inflammation affecting brain blood vessels may lead to stroke-like symptoms.
Recognizing atypical presentations can help prevent delays in diagnosis and treatment.
Reference
Sendor A, Wentrys L, Stopyra L. Neuroborreliosis as a cause of acute ischemic stroke in a 13-year-old patient. Cureus. 2025.
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
