Undiagnosed Infections Are Silently Causing Chronic Disease | Dr. Richard Horowitz
July 29, 2026
AI Summary
5 min readIn 1987, a woman in a wheelchair arrived at Dr. Richard Horowitz’s practice in the Hudson Valley. She had been diagnosed with chronic Lyme disease and treated with antibiotics for five years, but she could not walk. Horowitz, a traditionally trained internist fresh out of Mount Sinai, tested her for a malaria-like parasite called Babesia—something not supposed to be in New York at the time. He treated it with a combination of Mepron and Zithromax. She walked out of the wheelchair. That case, one of over 13,000 Horowitz has treated, became the seed of a career spent mapping the hidden root causes of chronic illness. On this episode of The Dr. Hyman Show, Horowitz and Hyman—both doctors of last resort who have treated tens of thousands of patients failed by conventional medicine—lay out a unified framework for understanding why so many people are sick and what to do about it.
The Six Rivers of Inflammation
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What you'll learn
- 1 (00:00) **Introduction: The Hidden Epidemic of Undiagnosed Infections** - Dr. Hyman introduces Dr. Horowitz, who has seen over 13,000 chronically ill patients, and frames the core problem: traditional medicine misses the root causes of chronic disease.
- 2 (03:17) **The Origin Story: How a Buddhist Lama and a Wheelchair Patient Changed Everything** - Dr. Horowitz shares the personal and professional awakening that led him to root-cause medicine.
- 3 (06:13) **Dr. Hyman's Personal Story: The Patient Who Became the Doctor** - Dr. Hyman reveals he was a patient with multiple root-cause issues, which gave him deep compassion and insight.
- 4 (09:50) **The Six Rivers of Inflammation: The Root Causes** - Dr. Horowitz lays out the six principal causes of inflammation that drive chronic disease.
- 5 (10:58) **How to Actually Test for Tick-Borne Infections** - A practical guide on testing that most doctors miss.
- 6 (15:11) **The Mold and Heavy Metal Connection** - Mold toxicity is a hidden epidemic that cripples the immune system and mitochondria.
- 7 (18:38) **The Misdiagnosis Crisis: MS, Rheumatoid Arthritis, and Autoimmunity** - Many autoimmune diagnoses are actually tick-borne infections causing molecular mimicry.
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Guests on this episode
Show Notes
Living with chronic illness can feel like collecting diagnoses without getting real answers. Symptoms are treated one at a time, but the underlying causes can easily be missed. What if asking a different question is the first step toward feeling better?
In this episode, I’m joined by Dr. Richard Horowitz, an internationally recognized Lyme disease expert and author of the new book Ending Chronic Illness. After caring for thousands of patients over more than four decades, he explains why many seemingly unrelated conditions share common underlying drivers—and why thinking like a medical detective may help uncover them.
We discuss:
Why treating the diagnosis isn't always the same as treating the problem—and how to start looking deeper
How hidden infections, environmental toxins, gut health, and other overlooked factors can quietly drive chronic illness
What new research may reveal about the links between infection, inflammation, and brain health
How to begin uncovering what's really driving persistent symptoms
Our bodies are constantly communicating with us. The challenge isn't that they're silent—it's that we haven't always known how to listen. Sometimes finding better answers begins with asking different questions.
Continue Exploring
If you'd like to explore Dr. Horowitz's work further, here are two great places to start:
Take his Symptom Assessment Quiz to better understand what may be contributing to your symptoms.
Subscribe to his Medical Detective Substack ****for ongoing insights into chronic illness, Lyme disease, and root-cause medicine.
Interested in getting tested?
Many of the lab tests discussed in this episode are available through Function, making it easier to get a more comprehensive picture of your health.
View Show Notes From This Episode
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