Supreme relief with Zyrtec

I’ve had 2-3 migraine days a week for a long time. I always seem to be in postdrome. I’ve never had traditional allergies (sore eyes, sinus issues etc) so never considered taking antihistamines. Usually, I’ll take suma or rizatriptan.

The last four days I’ve taken a Zyrtec at some point (I’m in Los Angeles and my eyes get sore if I spend too much time outdoors due to air quality) and my head has never been clearer or more pain free. I think I’m allergic to something environmental but don’t know what. I tend to react to bodily issues (being sick, flu, injury, infection) by having a migraine. Where would I even start in testing for this kind of thing?