I think I may be developing an allergy to tobacco smoke!  For the past couple of weeks, I've noticed that I get all stuffed up every time I'm around cigarette smoke.  I play poker at a club down the street, and during a break the other night all the smokers piled into a little room to light up.  Afterwards, the remaining smoke drifted out and my sinuses started getting stuffed up, my eyes started watering, and I started having some mild asthma symptoms.  Now, every time a passenger gets into my taxi stinking like cigarettes, I notice that I get a little sneezy for 20 minutes or so after they get out.