What Are the Signs and Symptoms of PANDAS Syndrome?

PANDAS (Pediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections) syndrome is characterized by a sudden onset of psychiatric and neurological symptoms in children, frequently following an infection that disrupts immune regulation. Families often observe a shift in behavior, where a child who was previously emotionally steady or developmentally typical begins to struggle in ways that were previously unfamiliar. Anxiety, irritability, obsessive thoughts, and compulsive behaviors may appear quickly and with intensity.
 
Alongside emotional and behavioral changes, physical and neurological signs are commonly present as well. Handwriting may deteriorate noticeably over a short period of time, sleep patterns can become inconsistent, and new issues such as bedwetting may appear without an obvious cause. Some children develop motor coordination difficulties, unusual movements, joint discomfort, or fatigue that interferes with daily routines and school participation.
 
At The Center for Occupational and Environmental Medicine (COEM), specialists prioritize early identification of these patterns to facilitate swift intervention. When symptoms are recognized during an acute or episodic phase, intervention can begin before immune-driven neurological changes become long-term concerns. This supports both symptom stabilization and long-term developmental health by addressing the underlying immune response rather than focusing only on surface behaviors.
 
Often, children with these conditions end up undergoing psychological/psychiatric evaluations, and these issues are never fully addressed. Some mental health professionals are now realizing there is an additional component and will refer to physicians, such as those at COEM, to handle the clinical aspects related to PANDAS while they assist with the emotional load.

Behavioral changes associated with PANDAS often feel disproportionate to the child’s prior emotional baseline. Heightened anxiety may disrupt daily life, accompanied by sudden emotional volatility, fearfulness, or rigid thinking. Reactions can appear extreme or out of character, with emotional responses escalating quickly and resolving slowly. These shifts can disrupt family dynamics and create confusion around discipline or expectations. Obsessive behaviors and compulsions are another type of presentation. These may involve repetitive thoughts, reassurance seeking, ritualized actions, or avoidance behaviors that were not present before symptom onset. Some children develop restrictive eating patterns or heightened sensory sensitivities that interfere with meals, clothing choices, or classroom participation. Social withdrawal or regression in age-appropriate independence is also common.
 
The specialists at COEM evaluate these behavioral changes in the context of immune function and neurological regulation. By examining the timing, severity, and progression of symptoms, care plans can be structured to address both the immune trigger and the resulting neuropsychiatric presentation. This framework allows behavioral symptoms to be treated with a broad physiological process.

Attention and concentration are frequently adversely impacted in children experiencing PANDAS-related symptoms. Sudden difficulty focusing, completing tasks, or following instructions may emerge even in children who previously had no learning challenges. This disruption often coincides with heightened anxiety or obsessive thought patterns that consume mental bandwidth and interfere with sustained attention. Teachers and caregivers may observe increased distractibility, mental fatigue, or difficulty transitioning between activities. Academic performance can decline rapidly, not due to lack of effort but because cognitive resources are being diverted toward managing internal distress. In some cases, processing speed slows, making it harder for the child to keep pace with classroom expectations.
 
At COEM, attention changes are evaluated according to each individual’s unique neurological and immune considerations. Advanced laboratory testing and detailed clinical assessment help clarify whether inflammation, immune activation, or infection-related processes are contributing to cognitive strain.

PANDAS symptoms often follow a pattern of relapse and omission, with periods of relative stability interrupted by sudden flare-ups. These episodes can be linked to immune activation, reinfection, or environmental stressors that provoke an inflammatory response. During flare periods, symptoms may intensify rapidly, mirroring the abrupt onset seen at initial presentation. Between episodes, some children experience partial improvement, while others return close to their prior baseline. Without targeted care, however, repeated immune-driven episodes can increase the risk of symptoms becoming persistent. Over time, this can affect emotional regulation, learning, and social development, particularly if the immune system remains dysregulated.
 
Early and ongoing care at COEM allows symptom patterns to be monitored closely. By identifying triggers and supporting immune balance, care plans aim to reduce both the severity and duration of symptom episodes. This approach supports long-term neurological resilience rather than episodic crisis management alone.

Dr. Stephen P. Elliott, MD, brings decades of experience in family medicine and functional medicine to the evaluation of pediatric autoimmune and neuroimmune conditions. As the only MedMAPS-certified physician in the region, his training reflects a deep focus on immune mediated neurological disorders that affect behavior, cognition, and emotional regulation. This background supports careful differentiation between primary psychiatric conditions and immune-driven syndromes such as PANDAS.
 
At COEM, Dr. Elliott’s approach involves detailed clinical history, advanced laboratory analysis, and individualized care planning. Evaluations consider immune health, infection history, environmental exposures, and neurological presentation together to inform a clear picture of a patient’s health. This allows care plans to address triggering infections, immune inflammation, and neurological stability. Treatment strategies may include antimicrobial therapy, immune modulation, nutritional support, and coordination with therapeutic services such as cognitive behavioral therapy when appropriate. By aligning medical management with long-term wellness goals, Dr. Elliott supports children and families seeking clarity, stability, and durable improvement.
 
The Center for Occupational and Environmental Medicine (COEM) provides PANDAS syndrome treatment. For more information, contact us today or schedule an appointment online. We are conveniently located at 7510 North Forest Drive North Charleston, SC 29420. We serve patients from Charleston SC, Mount Pleasant SC, Summerville SC, North Charleston SC, Goose Creek SC, Ladson SC, Hanahan SC, James Island SC, John’s Island SC, Daniel Island SC, West Ashley SC, Moncks Corner SC, Sullivans Island SC, Folly Beach SC, Isle of Palms SC and all of South Carolina, Nationally, and Internationally. Patients routinely fly into Charleston to be evaluated by COEM and to enjoy this beautiful city, which is a Condé Nast and Travel and Leisure Top Domestic and International Tourist Destination.