Guess what? The birds are chirping, the trees are flourishing, the flowers are blooming. And if you’re susceptible to allergies, the pollen is, well, ugh. I write this every year at this time, so it’s another update. It’s around this time that tree pollen — from oak, maple and birch, for example — becomes the big driver for allergies. When I was a kid, I never had allergies. Then one day, as a college student, I went to visit a good friend in Richland Center and, bang, my all