Jessica and tend to suffer all year round well on and off, she'll be suffering on a day I am fine. I think it's a mixture.
But someone once mentioned to me topical allergies, so maybe people are a bit more allergic than they used to be and/or there are other factors besides pollen/seasonal stuff.
We buy cheap antihistamines for like 12 months at a time and just gobble them.
Apologies that this might be completely unhelpful. :/