Can Lyme Disease Cause Nausea and Digestive Problems?
Can Lyme disease cause nausea or diarrhea?
Abdominal pain, vomiting, and digestive symptoms may occur.
These symptoms are often overlooked or misdiagnosed
Many patients ask: can Lyme disease cause nausea or unexplained digestive problems? Lyme disease gastrointestinal symptoms can include nausea, abdominal pain, diarrhea, vomiting, and appetite changes—yet these symptoms are often overlooked.
Digestive symptoms may appear early in infection or develop later as part of a broader symptom pattern involving fatigue, neurologic symptoms, or autonomic dysfunction.
Quick Answer: Can Lyme Disease Cause Nausea or Diarrhea?
Yes. Lyme disease can cause nausea, diarrhea, and other gastrointestinal symptoms through inflammation, nervous system involvement, coinfections, and autonomic dysfunction.
Lyme disease gastrointestinal symptoms may include nausea, diarrhea, abdominal pain, appetite changes, constipation, bloating, vomiting, and altered bowel habits. These symptoms may result from inflammation, autonomic dysfunction, nervous system involvement, coinfections, or treatment-related effects.
These symptoms are frequently missed because they resemble more common gastrointestinal disorders.
Common Lyme Disease Gastrointestinal Symptoms
- Nausea
- Diarrhea
- Abdominal pain
- Bloating
- Vomiting
- Loss of appetite
- Constipation
- Early fullness after eating
- Intermittent bowel changes
These symptoms may occur alone or alongside fatigue, pain, dizziness, or neurologic symptoms.
Why Lyme Disease Can Affect the Gut
Several mechanisms may explain digestive symptoms in Lyme disease:
- Inflammation: Systemic immune activation may contribute to nausea or appetite loss
- Nervous system involvement: Neuroborreliosis and autonomic dysfunction may affect gut motility, bowel function, appetite regulation, and abdominal sensation
- Coinfections: Associated infections may worsen systemic symptoms
- Treatment effects: Antibiotics may temporarily affect gut microbiota
For related mechanisms, see autonomic dysfunction in Lyme disease.
Neuroborreliosis and Gastrointestinal Symptoms
In some cases, gastrointestinal symptoms may reflect nervous system involvement rather than a primary gastrointestinal disorder. Lyme neuroborreliosis can affect sensory nerves, autonomic pathways, and gut motility, potentially contributing to symptoms such as nausea, abdominal pain, constipation, bloating, diarrhea, or changes in bowel habits.
Case reports highlight how gastrointestinal symptoms may occasionally dominate the presentation. One report described an adult with neuroborreliosis who developed abdominal pain, constipation, bowel dysmotility, and ileus thought to be related to autonomic dysfunction and nervous system involvement.
Pediatric presentations may also be atypical. A published case described a child with severe abdominal pain as the first manifestation of Lyme neuroborreliosis before later developing attention difficulties, gait abnormalities, and neurologic findings.
These reports do not suggest that most digestive symptoms are caused by Lyme disease. However, they illustrate why Lyme disease may deserve consideration when gastrointestinal symptoms remain unexplained—particularly when accompanied by fatigue, dizziness, neurologic symptoms, cognitive complaints, or possible tick exposure.
Why Lyme Disease Gastrointestinal Symptoms Are Often Misdiagnosed
Digestive symptoms are frequently attributed to:
- Viral illness
- Food intolerance
- Irritable bowel syndrome (IBS)
- Stress or anxiety
- Medication side effects
As a result, Lyme disease may not be considered—especially if classic symptoms such as rash are absent.
See Lyme disease misdiagnosis for additional diagnostic challenges.
When to Consider Lyme Disease
Lyme disease may deserve consideration when digestive symptoms:
- Appear with fatigue, brain fog, or joint pain
- Fluctuate or do not follow a typical pattern
- Occur after possible tick exposure
- Occur alongside dizziness or autonomic symptoms
Review broader symptom patterns in the Lyme disease symptoms guide.
Frequently Asked Questions
Can Lyme disease cause nausea?
Yes. Lyme disease can cause nausea through inflammation, autonomic dysfunction, neurologic involvement, and coinfections.
Does Lyme disease cause diarrhea?
Yes. Some patients with Lyme disease report diarrhea, bowel changes, or altered gut function. These symptoms may relate to inflammation, autonomic dysfunction, coinfections, or nervous system involvement.
Can Lyme disease cause vomiting?
Vomiting is less commonly reported than nausea but may occur alongside other gastrointestinal symptoms or neurologic involvement.
Why does Lyme disease affect the stomach?
Digestive symptoms may relate to nervous system involvement, inflammation, autonomic dysfunction, or associated conditions affecting gut function.
Can autonomic dysfunction cause digestive symptoms?
Yes. Dysautonomia can affect gut motility, appetite regulation, bowel function, and abdominal discomfort.
Can digestive symptoms delay Lyme diagnosis?
Yes. Because nausea, diarrhea, vomiting, and abdominal symptoms are common and nonspecific, Lyme disease may not initially be considered.
Clinical Takeaway
Lyme disease gastrointestinal symptoms can include nausea, diarrhea, abdominal pain, appetite changes, constipation, vomiting, and altered bowel function.
Because these symptoms overlap with many gastrointestinal conditions, Lyme disease may be overlooked—particularly when digestive complaints occur alongside neurologic symptoms, autonomic dysfunction, or unexplained systemic illness.
Related Articles
These related articles explore neurologic symptoms, persistent illness, delayed diagnosis, and recovery patterns that may overlap with gastrointestinal complaints.
Neurologic Lyme disease
Delayed Lyme disease diagnosis
Post-treatment Lyme disease syndrome
Persistent Lyme disease
Recovery from Lyme disease
References
- Zulfiqar S, Qureshi A, Dande R, Puri C, Persaud K, Awasthi S. The many manifestations of a single disease: neuroborreliosis. J Community Hosp Intern Med Perspect. 2021;11(1):56–59.
- Savasta S, Fiorito I, Foiadelli T, Pichiecchio A, Cambieri P, Mariani B, et al. Abdominal pain as first manifestation of Lyme neuroborreliosis in children, case report and review of literature. Ital J Pediatr. 2020;46:172.
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
