Lyme vs. Fibromyalgia
Fibromyalgia is defined by widespread musculoskeletal pain, fatigue, and tenderness, with no identified infectious cause. Chronic Lyme can produce a nearly identical picture. Many people carry a fibromyalgia label for years before a tick-borne infection is considered.
Where they overlap
Key differences
| Lyme | Fibromyalgia | |
|---|---|---|
| Cause | Infection (Borrelia ± coinfections) | No identified infectious cause |
| Pain pattern | Often migrates joint to joint | Widespread, symmetric tender points |
| Fever / night sweats | Can occur | Not typical |
| Neurological signs | Common (tingling, facial palsy, nerve pain) | Less prominent |
| Treatment | Antibiotics may help | Symptom management (no cure) |
Why the two get confused
Fibromyalgia is often a diagnosis of exclusion — given when no other cause is found. But if Lyme was never properly ruled out (and standard tests miss cases), an infection can hide behind the fibromyalgia label. The distinction matters because Lyme has a potentially treatable cause.
Frequently asked questions
Can Lyme cause fibromyalgia?
Lyme and its coinfections can produce fibromyalgia-like widespread pain, and some people diagnosed with fibromyalgia improve when an underlying tick-borne infection is identified and treated. A Lyme-literate evaluation can help sort this out.