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Lyme Disease Misdiagnosed as ADHD in Children
Over the years in clinical practice I have evaluated a number of adolescents and children with suspected Lyme disease, often after symptoms had evolved over time. In some cases, the initial concern raised by families or schools was attention problems or behavioral changes.
These situations sometimes lead clinicians to consider attention deficit hyperactivity disorder (ADHD). While ADHD is common and often appropriately diagnosed, Lyme disease misdiagnosed as ADHD can occur when infection-related symptoms affect concentration, mood, and school performance.
Recognizing this overlap is important because Lyme disease can affect the nervous system in ways that influence cognition, behavior, and emotional regulation.
Some of these patterns overlap with issues I have discussed in other pediatric Lyme disease cases. In Behavioral Changes in Children With Lyme Disease, I describe how infection-related inflammation can affect mood, irritability, and attention. In Early Signs of Lyme Disease in Children, I review how cognitive changes and school difficulties may appear before more recognizable symptoms such as rash or joint pain.
When Lyme Disease Symptoms Resemble ADHD
Children with Lyme disease may develop symptoms that resemble ADHD. These may include:
- Difficulty concentrating
- Forgetfulness
- Declining school performance
- Irritability or mood swings
- Sleep disturbances
- Fatigue that interferes with learning
In some children these symptoms appear gradually. Teachers may notice changes in attention or academic performance before physical symptoms become obvious.
Because ADHD is relatively common, the possibility of infection may not initially be considered.
Why Lyme Disease Can Affect Attention and Behavior
Lyme disease is a multisystem infection caused by Borrelia burgdorferi. The infection can affect the nervous system, immune signaling, and inflammatory pathways.
Some children develop neurologic or cognitive symptoms such as headaches, memory problems, slowed processing, or sensitivity to light and sound. These symptoms may interfere with classroom learning and concentration.
In my experience evaluating adolescents with suspected Lyme disease, families sometimes report that a child who previously functioned well in school begins struggling with focus, organization, or emotional regulation.
When these changes occur alongside physical symptoms—such as fatigue, headaches, joint pain, dizziness, or sleep disruption—Lyme disease deserves consideration.
Patterns That Raise Clinical Suspicion
Lyme disease misdiagnosed as ADHD is more likely when attention difficulties occur alongside other unexplained symptoms.
Clinical patterns that may raise suspicion include:
- Sudden change in school performance
- New headaches or fatigue
- Joint or muscle pain
- Dizziness or autonomic symptoms
- Sleep disruption
- Fluctuating symptoms
Exposure history can also be important. Children living in or visiting tick-endemic regions may be at higher risk for Lyme disease.
In these situations, a broader clinical evaluation may be appropriate.
Why Misdiagnosis Can Occur
Lyme disease misdiagnosed as ADHD does not occur because clinicians overlook obvious signs. Instead, it reflects the complexity of Lyme disease presentations.
Several factors contribute:
- Children often do not recall a tick bite.
- The classic erythema migrans rash is not always recognized.
- Symptoms may appear gradually.
- Attention problems may appear before other physical symptoms are recognized.
When symptoms involve multiple organ systems, diagnosis can be challenging.
A Balanced Clinical Perspective
Most children with attention problems do not have Lyme disease. ADHD remains a common and important diagnosis.
However, Lyme disease misdiagnosed as ADHD can occur when infection-related symptoms affect cognition, mood, and physical functioning.
For clinicians, parents, and educators, the key is to remain open to reconsideration when symptoms evolve or when additional physical findings appear.
Careful clinical evaluation remains the most reliable way to distinguish between primary ADHD and medical conditions that may affect attention and behavior.
Related Pediatric Lyme Disease Topics
- Early Signs of Lyme Disease in Children
- Lyme Disease Rash in Children
- Behavioral Changes in Children With Lyme Disease
- Pediatric Lyme Disease
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
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