well after about 2 months of vaping i noticed my nose itself was drying out. I wasn't normally blowing it out of my nose normally but one night i was, it dried out enough to give me a nose bleed, i wouldn't suggest blowing it out of your nose. PG pulls the moisture out of the skin, drying it out. maybe that on top of the low quality carto, its just finally catching up with the other changes from quiting smokin