Chest was the worst, but it spread to my sides, up my neck a little, inside my elbows. Maddeningly itchy, red (maybe from scratching), tiny bumps. Switching to other VG cleared it up - but within a few weeks, it reappeared. Switching back to original VG cleared it up briefly, then it reappeared. Etc. - very frustrating. My current VG is from Bullcityvapor, and I've used it without problems almost 2 months.
Before I switched to max VG, I was using at least 50% PG, and didn't have the rash/itch. (But PG makes my tinnitus worse. Max VG fixes that, as long as I stay under about 5% PG-based flavoring.) As long as Bullcityvaper VG keeps working for me, I'll be able to hear clearly AND be itch-free.