The hallmark difference is onset. Typical OCD develops gradually over months or years. PANS/PANDAS arrives like a light switch — one week your child is fine, the next they have intense rituals, refuse to eat, can’t separate from you, or won’t touch doorknobs. The severity is also different: PANS/PANDAS OCD is often dramatically more debilitating. And the triggers matter — PANS/PANDAS symptoms often flare with new infections, which is a pattern typical OCD does not follow. This is why accurate diagnosis matters so much; the underlying autoimmune process requires medical treatment that OCD alone does not.