I found this to be a real eye-opener for a disorder that seems to be otherwise intangible.
I found this on one of the bazillions of informational and treatment sites for OCD. I’ve added a link to it below as it has lots of good, basic information about OCD and anxiety disorders in general. This is also one of the few sites that actually acknowledges the existence of “PANDAS”, or pediatric autoimmune neurobiological disorders associated with streptococci, which is the onset of childhood OCD associated with strep throat (to simplify), and a high fever at an early age. It kinda gets your mind going trying to remember, huh?
Anyway, there’s a lot of good info to explore and ponder on this site. I’ve come up with some decent questions for our doctor by perusing sites like this.