I've noticed my gums are tender to painful on my front, upper teeth. I've been vaping for almost exactly a year, zero tar sticks for 10 months of that, not even a drag.
I vape only PG - Johnson's Creek 24mg plus 1/3 of Totally Wicked 36mg flavorless thru an m4x series with an auto batt. The extra nic I only started adding the last few months in search of better/more throat hit. The gum bit has been ongoing since maybe the 2nd or 3rd month of vaping when I got to be doing it much more than cigarettes.
Here's my theory as to why this might be, taken from experience and something I just read here:
1) I've read here some talk that vaping dries/dehydrates your mouth. I can relate as sometimes my lips even get bumps from the dryness. I vape like I smoked - non-stop like a freaken stack on a paper mill. I was thinking it was the coffee I drink but the notion it dries you out has been debunked these days, I think.
2) And here's maybe the culprit: I find you end up, many/most times, having to drag MUCH harder on a "vaporette" (that's what 'I' call them - much easier and catchier than "personal vaporizor", which sounds like something for sick kids or old folks) than a real cigarette. This causes your - dry - inner upper lip to purse and squeeze against the - dry - front surface of the gums on your upper front teeth and irritates them. I've tried changing which side I drag from and the problem seems to go to that side after awhile.
What do y'all think?
C-ya!
Rick