Spring and I have a love-hate relationship... It's so wonderful to see everything come back to life after the winter, but that pesky pollen goes to war with my nose, eyes, and throat!
I used to joke that I was allergic to everything that grows.

Seriously, though, I am allergic to both tree pollen (heavy in early spring) and grass pollen (heaviest in late spring)... so spring allergies are always the worst for me!
What time of year is hardest for you? Fall is a close second, with all that ragweed blooming...
