I had the same thing, Stayaway, when I was smoking last summer. It dried out and irritated my sinuses, my nose, my eyes and made me sneeze and aggravated my asthma. I definitely had some allergic reaction to it. Cannabis smoking does that to a good many people, at least according to an allergist friend of ours who knew we were using it for my sister's chemo symptoms and knew I was toking with her. He suggested I take a small dose of Benadryl before I smoked to help alleviate those symptoms. And I was never sure that the actual runny nose part of the allergies wasn't from the fact that we smoked outside amongst all the pollen and dust and grass clippings instead of inside in filtered air. I'm allergic to nearly every plant substance on earth, sadly, so it was no surprise. I'm always sneezing and itching and having a runny nose, no matter what season.