I'm not 100% sure but I'm starting to lean in the direction that one or more of the chemicals used to make v-juice is causing me to get sinus infections. I've been vaping now for almost 2 January 1st. will be 2 years (Will you look at that, a new years res that I actually kept.) And that is why this is such a bummer if it turns out that I'm allergic to one or more of the chemicals. From day one when I started vaping will the first infection popped it ugly head out at month 2 mid Feb. 2015 looking at my medical records so about every 3 I've been blessed with another infection. It goes like this doctor gives me a 10 day round of antibiotics which is always followed by at least one more round but mostly 2 more so on avg. I'm taking antibiotics for 30 days then I'm good for about a month then the sinus headaches start followed green bloody mucus which I let go for at least 2 weeks before contacting my doctor I've tried Neti pot which helps a lot but it's not enough to get rid of the infection. Anyway I was wondering if anyone else was having problems and if so did they find a solution because I really don't want to end up smoking cigs again if I can't handle the nic withdrawal