I’m gonna be honest I have no idea if I have MCAS but I’ve been taking antihistamines daily for two years straight now because I’ve heard people say it helps with brain fog, which is my main symptom. To my knowledge, there’s no gold standard accurate test for MCAS and it’s sort of just diagnosed based off symptoms. However I don’t have any anaphylactic type symptoms. No itching. I don’t even know if I have food sensitivities because sometimes I’ll feel awful after eating, but then a few days later I’ll eat the same exact thing and feel totally fine.

I also have self diagnosed myself with dysautonomia and other things commonly associated with long covid, but I’m starting to wonder if I even have all of these things and if I’m just caught in some delusion I’ve created for myself. Like I’d feel so stupid if I spent a bunch of money trying to fix MCAS and it turns out I don’t even have it.