Lyme Disease vs Long COVID: How to Tell the Difference
Lyme disease and long COVID can look nearly identical.
Fatigue, brain fog, and nerve symptoms overlap.
But the timeline of symptoms often reveals the difference.
Lyme disease and long COVID can cause many of the same symptoms—but they are not the same condition. The key difference is often when symptoms began and how they evolved over time.
For a broader overview, see Lyme vs Long COVID.
A Case That Looked Like Long COVID
He wasn’t losing his mind—he was losing time. Each week blurred into the next as fatigue and fog deepened.
A patient came to me months after recovering from COVID-19. He still felt drained—exhausted, foggy, and plagued by a burning sensation in his head.
He told me, “I’ve accepted that I’m one of those long COVID cases.”
But as I listened more closely, something didn’t fit.
His fatigue had started before COVID. He also described joint pain, tingling in his hands, and night sweats—symptoms more consistent with a tick-borne illness.
Lyme Disease vs Long COVID: Key Differences
- Lyme disease: symptoms may begin before a known illness
- Long COVID: symptoms begin after COVID infection
- Lyme disease: may include night sweats and migratory joint pain
- Long COVID: more often dominated by post-viral fatigue patterns
- Lyme disease: may involve co-infections such as Babesia
- Long COVID: not associated with tick-borne infections
The timeline of symptoms is often the most important clue.
Why Symptoms Overlap
Post-infectious syndromes like long COVID and post-treatment Lyme disease syndrome (PTLDS) can look nearly identical:
- Brain fog and slowed processing
- Persistent fatigue
- Head pressure or burning
- Muscle and joint pain
- Dysautonomia
Similarity does not mean sameness.
The Turning Point
Further evaluation revealed Lyme disease and Babesia co-infection—infections that likely predated COVID and resurfaced during immune stress.
We began targeted therapy. Within weeks, symptoms improved—fatigue lessened, head pressure eased, and concentration returned.
This was not long COVID. It was untreated tick-borne disease.
Why Misdiagnosis Happens
Since 2020, persistent symptoms after COVID are often labeled as long COVID.
For many patients, that diagnosis is correct. But in some cases, it may delay recognition of other conditions.
Tick-borne infections can mimic or amplify post-viral symptoms.
Clinical Takeaway
When symptoms predate COVID, include night sweats, or involve migratory pain, Lyme disease should be considered.
Lingering symptoms deserve investigation—not assumption.
The pattern of illness over time often provides the most important clue.
Frequently Asked Questions
Can Lyme disease be mistaken for long COVID?
Yes. The symptoms overlap significantly, especially fatigue and brain fog.
How can you tell the difference?
The timing of symptoms and features like night sweats or migratory pain can help distinguish Lyme disease.
Can you have both Lyme disease and long COVID?
Yes. In some cases, one condition may overlap or worsen the other.
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
i am going through hell but don’t work good with med
Can I fly out to be tested! I have those symptoms! I also was on Lariam back in my days in Africa 1995 and always thought this be the reason for symptoms,but I worked on Eastern long island ,tick capital,plum Island nearby! Ty Joseph!
I have advised against treatment for Babesia with Lariam due to side effects