Pediatric Lyme Disease Behavior: Why Children Are Misdiagnosed

Behavior changes may be an early clue
Symptoms can resemble ADHD or anxiety
Delayed recognition may prolong recovery

Pediatric Lyme disease misdiagnosis can occur because the illness does not always resemble familiar textbook descriptions. Understanding the broader patterns of pediatric Lyme disease may help explain why diagnosis is sometimes delayed. While some children develop recognizable physical symptoms, others may experience sudden behavioral changes, academic struggles, or neuropsychiatric symptoms that are initially attributed to other causes.

Parents searching for explanations for sudden behavior changes may not realize that pediatric Lyme disease behavior problems can resemble ADHD, anxiety, or learning difficulties.

This diagnostic overlap means some children may be evaluated for ADHD, anxiety, or “growing pains” before an underlying medical illness is considered.

When Academic Success Disappears Overnight

Note: Patient details have been modified to protect privacy. This case represents a composite of pediatric Lyme disease presentations I have observed in clinical practice.

Maya had never struggled in school. At 13, she was in advanced classes and maintained close friendships. Two weeks after a family camping trip in upstate New York, everything changed.

First came severe headaches. Then she began forgetting homework assignments. Within a month, she was crying over math problems she previously solved easily, snapping at her parents, and complaining that her knees hurt.

Her pediatrician found nothing immediately concerning. Initial blood work was normal. “Probably just stress,” the doctor suggested.

A therapist considered ADHD—something that had never previously been an issue. The school recommended anxiety accommodations.

Maya’s mother kept a careful journal. She noticed what the specialists had not connected: the timing. Every symptom began within two weeks of the camping trip. When reviewing photographs, she also noticed a faint circular rash on Maya’s back.

When she brought this information to a clinician familiar with tick-borne illness, Lyme testing was ordered. Initial serology was negative, but the complete clinical evaluation—including the possible rash, exposure history, timeline, and symptoms—supported a diagnosis of Lyme disease.

Six months later, Maya had returned to her previous academic level. The months of confusion and worry might have been reduced if Lyme disease had been considered earlier in the diagnostic process.

How Pediatric Lyme Disease May Differ From Adult Infection

Lyme disease does not present identically in every child.

Behavioral and cognitive changes may be prominent. A previously well-adjusted child may suddenly develop anxiety, irritability, difficulty concentrating, or academic problems.

Joint pain may be dismissed. Intermittent or migratory joint discomfort can sometimes be labeled “growing pains,” particularly when swelling is absent.

Fatigue may be misunderstood. Significant fatigue may be attributed to poor sleep, stress, or changing adolescent routines.

Symptoms may fluctuate. A child may appear well on one day and significantly ill on another, making the overall pattern harder to recognize.

Testing Limitations

Antibody-based testing may be negative during early infection because a detectable antibody response has not yet developed. The timing of testing, the child’s symptoms, and the likelihood of exposure all affect interpretation.

A negative early test should therefore be considered within the complete clinical picture rather than used in isolation when symptoms and exposure history remain concerning.

Symptoms Are Misattributed

The overlap between Lyme disease and common childhood conditions can produce predictable diagnostic pathways:

• Academic struggles → ADHD evaluation
• Mood changes → psychiatric referral
• Joint pain → growing pains or sports injury
• Fatigue → sleep or lifestyle concerns

Each specialist may see one part of the problem. The possibility that a medical illness could connect the entire pattern may not be considered.

This reflects a broader education gap in Lyme disease recognition among some clinicians.

Tick Exposure Goes Unnoticed

Children frequently do not notice tick bites. Ticks can attach to the scalp, back, groin, or other areas that are difficult to inspect. A rash, when present, may also occur where it is not immediately seen.

Without a recognized tick bite or rash, Lyme disease may not enter the initial diagnostic discussion.

Children living in or visiting endemic regions and spending time in wooded, grassy, or brush-filled areas may face greater exposure risk, particularly in the Northeast, mid-Atlantic, and Upper Midwest.

Neuropsychiatric Symptoms and PANS

Some children with Lyme disease develop anxiety, irritability, difficulty concentrating, sleep disruption, or other neurologic and behavioral symptoms. These symptoms are not specific to Lyme disease and require evaluation for other medical, neurologic, developmental, and psychiatric explanations.

PANS, or Pediatric Acute-onset Neuropsychiatric Syndrome, describes the abrupt onset of obsessive-compulsive symptoms or severely restricted food intake accompanied by other neuropsychiatric symptoms. Multiple infectious and noninfectious triggers have been proposed, but the relationship between PANS and tick-borne infections remains under investigation.

Because symptoms may overlap, clinicians should avoid assuming either that every sudden behavioral change represents Lyme disease or that the symptoms are necessarily psychiatric in origin.

In my clinical experience, children who develop sudden neuropsychiatric symptoms following potential tick exposure benefit from a careful evaluation that considers both infectious and noninfectious causes.

Co-Infections Add Complexity

Some ticks can transmit more than one pathogen, and additional infections may complicate the clinical picture.

Babesia may cause fever, sweats, fatigue, headache, anemia, and shortness of breath.

Anaplasma can produce fever, headache, muscle pain, and laboratory abnormalities that may resemble an acute viral illness.

Bartonella species have been investigated in patients with complex neurologic or systemic symptoms. However, the extent of tick transmission and the relationship between Bartonella and specific behavioral symptoms remain uncertain.

Standard Lyme disease testing does not identify these other infections. Testing for coinfections should be guided by the child’s symptoms, exposure history, physical findings, and laboratory results.

Early Recognition Matters

When Lyme disease is identified early, treatment is generally more straightforward and the likelihood of timely recovery is greater.

Symptoms that interfere with school, social development, sleep, physical activity, or family functioning deserve careful evaluation rather than being attributed automatically to behavior or stress.

Although early diagnosis does not guarantee an uncomplicated recovery, it provides the best opportunity for appropriate treatment before symptoms become more disruptive.

Trust Parents, Question Assumptions

Pediatric Lyme disease can look different from one child to another. Behavioral changes, school problems, pain, fatigue, and other unexplained symptoms deserve careful evaluation—especially when they begin suddenly or follow potential tick exposure.

Parents often recognize subtle changes before clinicians because they observe their child across multiple environments, including home, school, sports, and social activities.

That perspective has clinical value and should be taken seriously without assuming in advance that Lyme disease—or any other single diagnosis—explains every symptom.

Frequently Asked Questions

What are common symptoms of Lyme disease in children?

Children may develop a rash, fever, fatigue, headache, facial weakness, joint pain or swelling, and neurologic symptoms. Some parents also report behavioral changes or declining school performance.

Can Lyme disease cause psychiatric symptoms?

Lyme disease involving the nervous system may be accompanied by changes in mood, concentration, sleep, or behavior. These symptoms are not specific to Lyme disease and require evaluation for other possible causes.

Can Lyme disease look like ADHD?

Attention problems, slowed processing, fatigue, irritability, and academic struggles may resemble ADHD. A sudden change in a child who previously functioned well should prompt consideration of medical as well as developmental or psychiatric causes.

Why is pediatric Lyme disease missed?

Symptoms may overlap with common childhood illnesses, behavioral conditions, sports injuries, or psychiatric disorders. Tick bites and rashes may also go unnoticed, and antibody testing can be negative early in infection.

Are Lyme tests reliable in children?

Lyme antibody tests are useful when ordered and interpreted appropriately, but they may be negative during early infection. Results should be considered together with symptoms, exposure history, examination findings, and the timing of testing.

Can children recover fully?

Many children recover well when Lyme disease is recognized and treated appropriately. Some may experience a longer recovery, particularly when diagnosis or treatment is delayed.

Clinical Takeaway

Pediatric Lyme disease may be overlooked when behavioral, cognitive, or school-related changes receive more attention than accompanying fatigue, headaches, pain, sleep disruption, or possible tick exposure.

Recognizing the complete pattern may help reduce diagnostic delays while ensuring that other medical, developmental, and psychiatric explanations are also considered.

Related Articles

Pediatric Lyme Disease
Neuropsychiatric Lyme Disease
Brain Fog in Lyme Disease
Coinfections

References

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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