I apologize if this is not the correct place to post this - please move if it's in the wrong spot How long might a PG allergy take to manifest (I started out w/100% VG juices, moved to 50/50 and then to 70PG/30VG hoping to get a bit more flavor, & I've been alternating between the two (50/50 & 70P/30V) for several weeks now w/no problems. A few days ago I developed a patch of skin on the back of my neck (low & to the left) that hurts/burns like a really bad sunburn, but nothing is visible on the skin (me, hubby & daughter have all looked @ it - nothing there!) Yesterday I noticed a few "flat" but raised bumps (sort of like hives except they're skin-colored rather than red & they don't itch) on my face kind of to the side of my eyebrow. Could any of this be caused by PG?? LOL - just had to correct myself because in my 1st paragraph I accidentally typed "PV allergy" - no, that's definitely not it!