They Said It Was ADHD — But It Was Lyme Disease
Sometimes, it’s fatigue.
Sometimes, it’s Lyme disease.
Lyme disease ADHD symptoms can overlap—making diagnosis in children more difficult than expected.
A father brought his 12-year-old son to my office after months of growing concern. :contentReference[oaicite:0]{index=0}
His son had always been active and curious. But something had changed.
- He was irritable
- Forgetful
- Struggling to focus in school
- And constantly exhausted
His grades dropped. He stopped finishing homework. He didn’t want to go outside.
His teachers suggested ADHD. A pediatrician agreed.
But his father wasn’t convinced.
“I don’t think this is just attention. He’s not himself. He’s always tired—even after sleeping. Something just feels off.”
I’ve heard this story before.
When Behavior Masks a Medical Problem
When a child struggles with focus or behavior, it’s easy to assume a developmental or psychological cause.
But Lyme disease in children doesn’t always look like Lyme disease.
Instead, it may present with:
- Difficulty concentrating
- Poor memory
- Mood changes
- Sleep disruption
- Fatigue mistaken for laziness or depression
- Headaches or vague body discomfort
Clinical pattern: symptoms cluster—but don’t point clearly in one direction.
Many children develop cognitive symptoms similar to brain fog, affecting learning and attention.
In this boy’s case, key questions were never asked:
- Was he having headaches?
- Did he feel physically unwell?
- Was his thinking slower than usual?
The focus stayed on behavior—not underlying cause.
The Diagnosis Everyone Missed
A detailed history told a different story.
Testing revealed infection with Borrelia burgdorferi.
We began treatment—and within weeks, things changed.
- Focus improved
- Mood stabilized
- Energy returned
- School engagement improved
The difference was not subtle.
It was a medical problem—misinterpreted as behavioral.
ADHD or Lyme Disease? Sometimes Both
This does not mean ADHD isn’t real.
It means that Lyme disease ADHD symptoms can overlap—and sometimes coexist.
Infections can affect the nervous system, leading to:
- Slowed processing speed
- Irritability or mood swings
- Executive function challenges
- Sensory sensitivity
- Sleep disruption
- Fatigue limiting focus
Clinical reality: not every attention problem is primary ADHD.
Sometimes, it’s inflammation.
Sometimes, it’s infection.
And sometimes, it’s both.
The Cost of Missing the Diagnosis
When symptoms are attributed only to behavior, we risk missing:
- A treatable infection
- A reversible neurologic condition
- A child who feels misunderstood
Lyme disease is a “great imitator.”
In children, it may be labeled as:
- ADHD
- Anxiety
- Depression
- Behavioral or sensory disorders
Clinical takeaway: labels should not replace investigation.
When a child develops new attention problems, fatigue, or mood changes—especially after outdoor exposure—Lyme disease should remain in the differential diagnosis.
What Made the Difference
This case changed because a parent kept asking questions.
He trusted what he was seeing—even when the explanation didn’t fit.
That instinct led to the correct diagnosis—and recovery.
Key question: Could a sudden change in attention or behavior reflect an underlying medical condition?
Related Reading
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
