We think my(20m) girlfriend(19f) is allergy to glycerin because a normal water based lube burns her vagina. The reason I ask this is, I bought her an ecig, I work at a vape shop and make the juice for the shop and I make her juice from scratch, and vegetable glycerin (vg) is a main ingredient in the juice. I'm curious to see if anyone would know to see if the vg would bother her throat or lungs after her vapeing for a long period if time.

Edit: After looking through the ingredients to see if theres anything else in the lube that could be the culprit, we found propylene glycol, also another main ingredient in ejuice, is in it also. Could this also affect anything?