At a glance: PANDAS and tick-borne illnesses such as Lyme disease can occur in the same child simultaneously, and their symptoms overlap significantly — making accurate diagnosis more complex and underscoring the importance of a provider who is familiar with both conditions. A negative standard Lyme test does not definitively rule out tick-borne involvement, and children with a history of tick exposure and sudden neuropsychiatric symptoms deserve a thorough evaluation that considers both possibilities.
This is a question that comes up with increasing frequency in PANS and PANDAS clinical conversations — and for good reason. Families who live in tick-endemic areas, or who have spent time outdoors in regions where Lyme disease is common, often find themselves navigating two overlapping diagnostic landscapes at once. The symptoms look similar. The testing limitations are similar. And the providers who understand both conditions well enough to hold them simultaneously are not easy to find.
What makes this overlap particularly challenging is that neither PANDAS nor Lyme disease presents in a clean, textbook way in every child. Both can produce neuropsychiatric symptoms. Both involve immune system dysfunction. Both are frequently missed on initial evaluation. And both carry a history of being dismissed by providers who are not familiar with their full clinical presentations.
Understanding how these conditions can intersect — and what a thorough evaluation of that intersection looks like — is genuinely useful for families who are not getting clear answers from standard testing.
Lyme disease is caused by the bacterium Borrelia burgdorferi, transmitted through the bite of infected blacklegged ticks. Most people associate it with the bulls-eye rash and flu-like illness that can follow a tick bite. But Lyme disease, particularly when it goes undetected or inadequately treated in the early stages, can affect the central nervous system in ways that produce symptoms far removed from joint pain and fatigue.
Neurological Lyme — sometimes called Lyme neuroborreliosis — can produce a range of psychiatric and behavioral symptoms in children, including mood changes, anxiety, cognitive difficulties, and OCD-like behaviors. The mechanism involves both direct bacterial effects on the nervous system and the immune response that Lyme infection triggers — which can include neuroinflammation that looks, from a symptom standpoint, very similar to what PANDAS produces.
📊 Neuropsychiatric symptoms associated with Lyme disease and tick-borne co-infections in children:
Lyme disease is frequently accompanied by co-infections — other tick-borne organisms transmitted by the same tick bite. Two that come up most often in the context of neuropsychiatric symptoms are Bartonella and Babesia.
Bartonella — sometimes called cat scratch disease in its more commonly recognized form — has been associated with psychiatric symptoms including anxiety, rage, and OCD-like presentations in some children. The research on Bartonella's neuropsychiatric effects is still developing, but it is discussed with increasing seriousness in both the tick-borne illness and PANS clinical communities.
Babesia is a parasitic infection that affects red blood cells and can produce fatigue, sweating, and neurological symptoms. Its overlap with neuropsychiatric presentations is less well characterized than Bartonella's, but it is part of the picture that experienced providers consider when evaluating a child with a history of potential tick exposure and neuropsychiatric symptoms.
💡 Think of it this way: a tick bite is not always a single delivery. It can be more like a package with multiple items inside. When one of those items causes obvious symptoms, the others can go unnoticed — continuing to affect the body quietly while the more visible problem gets all the attention. Evaluating only for Lyme without considering co-infections misses part of what may have arrived in that bite.
This is the part of the conversation that frustrates families most — and for understandable reasons. A parent who suspects tick-borne involvement asks their child's provider to test for Lyme. The standard two-tier test comes back negative. The conversation ends.
What most parents are not told is that standard Lyme testing has well-documented and significant limitations, particularly in the early stages of infection and in children whose immune response has been atypical.
The standard two-tier testing protocol uses an ELISA screening test followed by a Western blot if the ELISA is positive. The problem is that the ELISA itself has a meaningful false-negative rate, particularly early in infection before the immune system has mounted a full antibody response. And the Western blot criteria were developed for surveillance purposes — meaning they were designed to be highly specific rather than highly sensitive, deliberately accepting some false negatives to minimize false positives.
📊 Key limitations of standard Lyme testing:
💬 If this framework is clicking for you and you're tired of piecing things together from random posts and forums, consider joining the Spectrum Care Hub Learning Community. You'll get full access to step-by-step biomedical coursework, printable tools, and new lessons added every month. Click here for details
Providers who are experienced in both PANS and tick-borne illness approach this evaluation differently than a standard pediatric workup. They are familiar with the limitations of standard testing and know which additional steps are worth considering when the clinical picture suggests tick-borne involvement despite negative standard results.
This may include specialty laboratory testing that looks at a broader range of Lyme markers than the standard two-tier protocol captures. It may include specific testing for Bartonella and Babesia rather than assuming those are absent because Lyme was negative. It may include a careful history of tick exposure, outdoor activities, travel to tick-endemic regions, and the timeline of any skin findings, flu-like illness, or joint symptoms that preceded the neuropsychiatric presentation.
It is worth being honest here about the state of the evidence: the overlap between PANS, PANDAS, and tick-borne illness is an area where providers genuinely hold different views on both the frequency of co-occurrence and the appropriate testing and treatment approach. This is not a settled question with universal consensus. What is settled is that the overlap is real and clinically significant in at least some children — and that a negative standard Lyme test does not close the door on that possibility.
For families in this situation — dealing with neuropsychiatric symptoms that might involve PANDAS, or Lyme, or both, or neither — the most important practical step is finding a provider who holds the full picture without defaulting to one framework and excluding the other.
A provider who only thinks about PANS may miss tick-borne involvement. A provider who only thinks about Lyme may miss the autoimmune neuropsychiatric process. The families who get the most useful answers are generally those working with someone who understands that these conditions can and do co-exist — and who knows how to evaluate for both simultaneously.
The PANDAS Physicians Network at pandasppn.org/practitioners is a starting point for providers experienced in PANS and PANDAS. Finding a provider familiar with both tick-borne illness and neuropsychiatric presentations may require additional searching, and in some cases, working with more than one specialist who can collaborate on the full picture.
How do I know whether to pursue Lyme testing for my child alongside a PANS or PANDAS evaluation? A history of tick exposure, time spent in tick-endemic areas, or any prior skin findings, joint pain, or flu-like illness that preceded the neuropsychiatric onset are all reasons to raise tick-borne illness as a possibility with your provider. You do not need a confirmed tick bite — many tick bites go unnoticed, particularly in children. If the clinical picture includes any of these elements, mentioning them specifically in the context of your child's neuropsychiatric presentation is worth doing.
Can treating Lyme disease resolve PANDAS-like symptoms? In children where tick-borne illness is driving or contributing to neuropsychiatric symptoms, appropriate treatment of the underlying infection may produce meaningful improvement. However, the immune dysregulation and neuroinflammation triggered by the infection can persist and require additional management even after the infection itself is addressed. Treatment in this overlap population is complex and requires a provider experienced in both areas.
My child has been diagnosed with PANDAS and is being treated, but not improving as expected. Could Lyme be a missing piece? Incomplete response to standard PANDAS treatment is one of the situations where experienced providers consider whether an unidentified co-occurring condition — including tick-borne illness — may be contributing. If your child has any history of tick exposure or outdoor activity in endemic areas, raising this question with your provider or seeking a second opinion that specifically evaluates for tick-borne involvement is reasonable.
Are there specific regions of the US where this overlap is more common? Tick-borne illness is more prevalent in certain regions — the Northeast, upper Midwest, and parts of the mid-Atlantic and Pacific Coast have higher rates of Lyme and related co-infections. However, tick-borne illness has been reported across a wider geographic range than was historically recognized, and travel history is as relevant as current residence. Living outside a traditionally high-risk area does not eliminate tick-borne illness from consideration.
If my child tests positive for both PANDAS and Lyme, which do we treat first? This is a clinical decision that requires a provider experienced in both conditions, and the answer varies based on the child's specific presentation, severity, and the results of their full evaluation. There is no universal sequencing protocol that applies to every child in this situation. What is generally understood is that leaving an active infection untreated while addressing only the immune response is unlikely to produce durable improvement.
💬 If this helped you see your child's behavior and biology in a new light, the next step is to keep building on that clarity. Our Spectrum Care Hub subscription gives you the complete course library, deeper dive modules, and ongoing support, so you don't have to navigate autism and PANS/PANDAS care alone. Click here for details
Last reviewed by Mary Margaret Burch, FNP-BC — March 2026 © 2026 Spectrum Care Hub LLC / SpectrumCareHub.com. This article is for educational purposes only. Nothing here constitutes medical advice or creates a provider-patient relationship. Always work with a qualified, licensed healthcare provider before making any medical decisions for your child.