Ha! It's all these glorious Trees and pollen over here where I live now. When I lived in the City years ago,I had no problems. My system apparently loved concrete and smog.
As I get older,more things just bother me,I guess.
When you change your environment, you are likely to get allergies.
Even though I had moved from one city to another, the flora was different, so I became allergic to tree pollen. When we moved here, in amongst a virgin forest, it didn't get that much worse, but didn't leave me, either. :-(