I'm in the middle of a flare up after a virus that I allegedly got over about 2-3 weeks ago. While I'm over the virus, the allergy/sinus drainage problems remain constant and heavy. The flare-up began at the onset of the virus, but it's still going. If I avoid my triggers I'm not having the yellow, acidic, painful visits to the bathroom.....but it's still not back to my "normal". I've wondered for a long time if sinus drainage played a factor, as it seems that when I have a lot of it, it can aggravate my IBS...or at least that's how it seems. Anyone else notice this?