I vape 80/20. It's because I can't tolerate PG. I will try 70%vg. Hope it will work for me [emoji106]I would occasionally get this when I puffed 80/20 liquid at higher watts (20-30, high for me, I mean). I never get it since I stopped that and started puffing 50/50 higher nic at low watts. I think too much vg doesn’t agree with men But you should speak to the doc if it’s worrying you.