Can Lyme Disease Cause Weakness and Hyporeflexia?
NUMBNESS AND WEAKNESS SPREADING WITHOUT EXPLANATION?
LYME DISEASE MAY PRESENT ATYPICALLY
“It started as numbness—then it spread everywhere.”
Lyme disease does not always begin with a rash, joint pain, or fatigue.
Quick Answer: Lyme disease can cause progressive weakness and hyporeflexia due to neurologic involvement, even without classic symptoms.
Clinical Insight: When neurologic symptoms worsen over weeks and do not follow a typical pattern, Lyme disease should remain in the differential diagnosis.
In some patients, neurologic Lyme disease presents primarily with sensory changes and reduced reflexes rather than the more familiar symptoms. :contentReference[oaicite:0]{index=0}
When symptoms don’t look like Lyme disease
A 25-year-old woman developed progressive numbness and tingling that began in her torso and spread over four weeks.
Her symptoms worsened steadily, eventually affecting her entire body.
Notably, she lacked the hallmark features typically associated with Lyme disease.
Instead, her presentation was dominated by sensory changes and hyporeflexia.
Alarming progression of neurologic symptoms
The symptoms significantly impaired her daily functioning.
She became increasingly alarmed when she could no longer hold her toddler due to weakness and sensory loss.
This pattern—progressive neurologic decline without a clear cause—is a common feature of atypical Lyme disease.
Neurologic findings
Neurologic examination revealed:
- Decreased muscle tone
- Weakness more pronounced in the upper limbs (3/5) than lower limbs (4/5)
- Hyporeflexia in the biceps, triceps, patellar, and Achilles tendons
These findings suggested involvement of the peripheral nervous system.
Diagnostic challenges
A lumbar puncture revealed elevated cerebrospinal fluid protein, indicating central nervous system involvement.
Lyme disease was confirmed with Western blot testing.
However, diagnostic findings in neurologic Lyme disease can vary.
In earlier studies, many patients with chronic neurologic Lyme disease had normal CSF results.
This variability highlights an important point:
Normal testing does not rule out neurologic Lyme disease.
Why Lyme disease may be missed
This case illustrates several reasons Lyme disease may not be recognized:
- Absence of classic symptoms such as rash or joint pain
- Atypical neurologic presentation
- Overlap with other neurologic conditions
These patterns are part of why Lyme disease tests the limits of medicine.
Treatment and recovery
The patient was treated with intravenous ceftriaxone followed by oral doxycycline.
Her response was rapid and significant.
At discharge:
- She regained full movement in all extremities
- Her gait returned to normal
This outcome highlights the importance of early recognition and treatment.
Why this case matters
Lyme disease can present with progressive neurologic symptoms that do not follow a typical pattern.
Weakness, hyporeflexia, and sensory changes may be the primary features.
Without recognition, diagnosis may be delayed and symptoms may worsen.
Clinical takeaway
Progressive weakness and reduced reflexes should not be dismissed when no clear diagnosis is found.
In endemic areas, Lyme disease should remain in the differential diagnosis—even when classic signs are absent.
Timely diagnosis can lead to rapid and meaningful recovery.
Frequently Asked Questions
Can Lyme disease cause weakness?
Yes. Lyme disease can affect the nervous system and lead to muscle weakness.
What is hyporeflexia in Lyme disease?
Hyporeflexia refers to reduced reflexes and may indicate neurologic involvement.
Can Lyme disease cause numbness and tingling?
Yes. Sensory symptoms such as numbness and tingling are common in neurologic Lyme disease.
Can Lyme disease be present without classic symptoms?
Yes. Some patients present with atypical neurologic symptoms without rash or joint pain.
Related Reading
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
