dairy/gluten and sinuses

I've been 95-99% raw vegan for 2 years. I noticed when I had treats (icecream, bread & butter ect) the next day, my sinuses would fill up. Now I'm doing the 30 day vegan challenge (I'm day 13) and I see a big improvement in my sinuses. In chinese medicine, when you eat something irritating to the colon (for me it's gluten/dairy) the colon makes mucus to protect itself. But the colon and sinuses are connected. When the colon makes mucus, the sinuses do as well. It's very interesting!