Lyme Disease After Pregnancy: Can Symptoms Appear Postpartum?
JOINT PAIN AFTER DELIVERY?
NO KNOWN TICK BITE?
COULD THIS BE LYME DISEASE AFTER PREGNANCY?
Lyme disease after pregnancy may present with new or worsening symptoms in the postpartum period—even when earlier symptoms were mild or unnoticed.
A 23-year-old woman from Brooklyn, NY, developed severe bilateral knee swelling and pain three days after delivering a healthy baby. She rated the pain as 8 out of 10 and noted worsening with walking.
She recalled a brief episode of knee pain during the sixth month of pregnancy, which resolved without evaluation.
During pregnancy, she had traveled to wooded areas in upstate New York, where Lyme disease is endemic. She did not recall a tick bite or rash.
Watch the case discussion:
Diagnosis of Lyme Disease
Testing confirmed Lyme disease with a positive Western blot showing 9 of 10 IgG bands, including 18, 23, 28, 33, 41, 43, 58, 66, and 93 kDa.
This pattern is consistent with prior exposure to Borrelia burgdorferi.
The patient was treated with a 3-week course of doxycycline, leading to full resolution of symptoms.
Her newborn remained symptom-free at birth and during follow-up.
Four Key Clinical Insights
1. Lyme Disease May Be Mild or Missed During Pregnancy
This case suggests Lyme disease may remain asymptomatic or minimally symptomatic during pregnancy.
In this patient, only brief joint pain occurred during pregnancy and was not investigated.
Symptoms appeared more clearly after delivery.
2. Postpartum Immune Changes May Unmask Symptoms
Symptoms may emerge after childbirth due to immune and hormonal changes.
The postpartum period represents a shift in immune regulation that may reveal previously controlled infections.
3. Absence of Tick Bite or Rash Does Not Exclude Lyme Disease
Diagnosis was supported by exposure history and laboratory findings.
This case highlights that Lyme disease should be considered even without a known tick bite or erythema migrans rash.
Learn more about Lyme disease test accuracy.
4. No Evidence of Congenital Lyme Disease in This Case
The infant showed no signs of Lyme disease at birth or during early development.
While this case is reassuring, further research is needed to fully understand the risk of congenital transmission.
Clinical Perspective
Lyme disease after pregnancy may present with joint pain, neurologic symptoms, or fatigue that begins or worsens postpartum.
Recognition requires attention to symptom patterns, exposure history, and regional risk.
Clinical Takeaway
Lyme disease can be mild or unrecognized during pregnancy and may present more clearly after childbirth.
Postpartum joint pain in patients with possible exposure should prompt evaluation for Lyme disease.
Frequently Asked Questions
Can Lyme disease stay hidden during pregnancy?
Yes. Some patients have mild or no symptoms during pregnancy, with symptoms emerging later.
Can Lyme disease appear after childbirth?
Yes. Postpartum immune changes may reveal symptoms that were previously mild or unnoticed.
Does Lyme disease affect the baby?
Most cases do not show congenital transmission, but research is ongoing.
What symptoms should raise concern after pregnancy?
Joint pain, fatigue, neurologic symptoms, or unexplained illness in endemic areas should be evaluated.
Related Articles
Lyme disease and chronic illness
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Medical dismissal in Lyme disease
References
Pavia CS, Wormser GP, et al. An unusual case of postpartum Lyme disease following asymptomatic infection during pregnancy. Case Reports in Infectious Diseases. 2018.
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
