I first had problems with it in L.A. and my doc there said that some percentage of people (it was a high percentage) who move to L.A. (as opposed to growing up there -- which as I write doesn't make a lot of sense) develop allergies. She cited pollution.
I don't know if I continued to have problems in Chicago or not -- I was just so overwhelmed in general and that was when the kid was small and I was focused on her.
This year I realized "hey, I always seem to have problems talking when school starts" (is that a problem, you cough when you try to project/ speak up?) and made some connections to the past few years.
I'm far more conscientious about sozlet's health than my own... I mean I try to stay healthy but don't think about it much one way or another, so took me a while to find patterns.