Reading this thread and the more I'm thinking about it I just had to chime in again. I say hormonal changes and detoxing cigg garbage! The first 2 months I had weird breakouts, not too bad (but there) on my face...most notably weird was on my scalp. I could just sit here and feel little painful bumps on my head through my hair that I would pick at and say "hmmm, weird". Also my skin was a bit dehydrated from the PG. Month 3all died down and my face and head are bump free at almost 4 months! I smoked almost 2 packs a day for 23 years...you KNOW that gunk permeated our very being and our bodies are thanking us!
I've felt that too in my scalp and I had one on my earlobe like someone else was saying. I think if it was the pg juice I would be experiencing breakouts on more of my body. It seems local to my face. It seems like things are calming down now hopefully that trend will continue