I bought an e cig a couple of months ago and everything was good for a month or so but i started to get some bad pain in my chest. I read it's a possibility that the pains are caused by sensitivity to pg. So i ordered vg liquid with no pg and it was fine for about to days, but it came back worse. pain in chest, shoulders, ears, wierd stomach pain, upper and lower back pain. it lasted about 5 days and then went away. I tryed using it without inhaling and got the earache again and the very strange part is i also got the lower back pain which was very bad and im almost sure that it is my kidneys. Does anybody know anything about this? I have reserched gycerine since and found a couple of pages that say glycerin in very high doses may cause resperitory, liver and kidney damage, but is generally recignized as safe. I know that i get chest and lower back pain, so it seems like to me that i might have a crazy hypersensitivity to glycerin maybe?