The sudden-onset hallmark

The hallmark of PANS and PANDAS is not simply the severity of the symptoms. It is the speed of onset. Clinicians and researchers look for an abrupt, dramatic change: something that happened overnight, or within the span of a few days. This is not a gradual slide.²

Why speed matters

In typical OCD or anxiety disorders, symptoms usually develop slowly. Parents notice their child becoming a little more anxious over weeks or months. There is rarely a single identifiable moment when everything changed. Therapists and psychiatrists are trained to expect this gradual arc.

With PANS and PANDAS, parents describe it differently.

These descriptions, specific and sudden and tied to a moment in time, are clinically significant. The ability to name the week, sometimes the day, is part of the diagnostic picture.²,⁶

The infection connection

The onset often follows or coincides with an illness. Many families look back and connect a strep infection, flu, ear infection, or other illness to the week everything changed.¹

The infection is not always obvious. Some children are asymptomatic strep carriers who test positive without ever feeling sick. The CDC notes that 10 to 15 percent of healthy children carry strep without symptoms, and rapid strep tests carry a 15 to 20 percent false negative rate.¹² A negative throat culture does not rule out strep as a trigger.

The relapsing-remitting pattern

The course is often episodic. Symptoms may improve significantly, then flare again after another illness, sometimes within days of a new infection. Some families live through cycles of much better and much worse that seem to track with illnesses in the household.¹

This relapsing-remitting pattern is itself part of the clinical picture, and tracking it over time is one of the most useful things you can do right now. PANS/PANDAS Companion is built for that.