I've always had mild acne. I'd always assumed it was because of the analogs and put up with it - there was no way I was going to the docs to be told to quit smoking! I KNEW I should quit smoking, I didn't need a medical professional telling me so!
Anyway, one of the reasons I switched to vaping was because I'm nearly 30 and I'm fed up with having spots. It's been a month (not that long) and I still have spots. In fact, about a week or two ago, I had a horrible outbreak. But I'd already read that quitting smoking can make you break out, so I'm not too worried.
My face is just about clearing up after that break out. But there's every chance I just have oily skin and am stuck with spots for life. I'm going to give it two more months then beg the docs to fix me!
Edit: Also, I'm pretty sure I have a VG sensitivity. Whenever I vape any juice with VG, my tongue goes numb - a bit like when you take a swig of too-hot coffee, or scald the roof of your mouth with pizza. I thought I had VT but I switched back to 100% PG liquid today and my tongue is coming back to life. Bit sad, as the juice I love isn't customisable in terms of PG/VG ratios.