I get that during alder and elm pollen seasons, but usually around eyes and mouth where I sweat a lot. I'm not allergic but I do feel a constant need to wash my

I get that during alder and elm pollen seasons, but usually around eyes and mouth where I sweat a lot. I'm not allergic but I do feel a constant need to wash my face that I never feel. Elm and alder pollen range from 15-50µm, I do not know how much/big pollution particles there are compared to that, but they usually measure PM10 and that is under 10µm, and in really badly polluted areas it is probably alot worse than pollen.