I also have hay fever. Symptoms: itchy throat, runny nose, sneezing like crazy.
For a while, I was doing perfectly fine with 50/50 VG/PG liquid. Then I don’t know, maybe my body got saturated, suddenly I started sneezing after vaping.
At that point, I switched to 100% VG, with PG-vitamin and PG-based flavorings in it. It comes out to 90/10 - 85/15 VG/PG. This way, it doesn’t cause problems. Of course, it should be noted that my tank is mesh DL, it doesn’t cause it any issues.
Besides that, liquids without cooling agents dry my throat a lot, and after a few minutes of vaping, it feels like I’ve swallowed cotton.
Since then, I almost exclusively vape cooling fruity liquids.
It’s important to know that cooling agents are not necessarily menthol. Menthol has a strange, bad aftertaste for me. I add A&L Fresh additive to non-cooling liquids, so it’s completely fine for me.