Since I have had for years and continue to have problems with my sinuses, I really can't comment on what is causing your issue. I have allergies, most notably to dust mites. On a scale from 1-10, where 1 is no sinus problems and 10 is severe problems, prior to vaping, I was at about an 8. With vaping, and not totally quitting analogs yet (have drastically cut down though), I'm at about a 5. So, it seems that reducing the analogs and vaping has improved my sinus condition.