And that, I believe, is the desired effect, and why hot peppers are popular around the world along the equator.
I can tell that I've "blown myself up" when my sinus/nasal passages swell up...like a cold. It goes away in about 20 minutes.
It usually happens with the curries.
What’s fun is chinese mustard. Blows your sinus up for a few seconds then poof nothing. Lots of fun.