What other diseases have symptoms similar to chronic Lyme disease?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Chronic Lyme disease is often difficult to diagnose because its symptoms closely overlap with those of other conditions, including chronic fatigue syndrome, fibromyalgia, and various autoimmune diseases. This symptom overlap can delay accurate diagnosis and effective treatment.

If you're experiencing persistent symptoms and aren't sure what's causing them, understanding the possibilities is the critical first step. A free, instant, online symptom check can help you identify potential conditions based on your unique symptoms and guide you on what to discuss with your doctor—saving you time and helping you take confident next steps toward answers.

Reviewed for medical accuracy: 07/15/2026

Important Next Steps

Learn if symptoms suggest chronic Lyme disease Discover likely causes of ongoing Lyme symptoms See if fatigue means Lyme-related illness Find OTC options for Lyme-like symptoms Find a doctor for Lyme disease symptoms Explore evidence-based home remedies for Lyme symptoms Understand if your symptoms need urgent care

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Explanation

Chronic Lyme disease, also known as post-treatment Lyme disease syndrome, shares symptoms with several other conditions, which can make it hard to tell them apart. Chronic Fatigue Syndrome (CFS) is one such condition. Both chronic Lyme disease and CFS can cause extreme tiredness, sleep problems, and trouble concentrating.

Another condition with similar symptoms is Fibromyalgia. People with fibromyalgia often experience widespread pain, tiredness, and sleep disturbances, which are also seen in chronic Lyme disease.

Additionally, some autoimmune diseases might have overlapping symptoms. These diseases can cause joint pain, fatigue, and other systemic symptoms that can resemble those of chronic Lyme disease.

Because these conditions share symptoms, doctors must consider these possibilities when diagnosing someone with symptoms of chronic Lyme disease. If you're experiencing persistent fatigue, joint pain, or other concerning symptoms, try our free AI-powered symptom checker to help identify possible causes and determine whether you should seek medical care.

(References)

Bai NA, & Richardson CS. (2023). Posttreatment Lyme disease syndrome and myalgic .... Chronic diseases and translational medicine, 37711861.
Seidel MF, Domene AB, & Vetter H. (2007). Differential diagnoses of suspected Lyme borreliosis or .... European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology, 17605053.
Gaudino EA, Coyle PK, & Krupp LB. (1997). Post-Lyme syndrome and chronic fatigue .... Archives of neurology, 9362985.

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