Most of the juices I vape don't really specify what the PG/VG ratio is but wondering if anyone else has had any inflammation in their chest region due to it? I know I need to switch up my juice but am at a loss on what is causing me issues. I've been to the doctor and had every possible test ran and my lungs are fine, heart is fine, everything is good. But, I've been having almost a tenderness in my chest muscles - I even briefly had costochondritis and I feel almost certain it's due to vaping since when I don't do it, it goes away. I don't want to start smoking again but have been vaping for about 2 and a half years and this problem is only within the past 4 months. It's not every day or unbearable but if I knew that PG or VG caused more inflammation then it might be easier to make some changes. Also, I tend to vape Charlie Noble and Space Jam the most but neither of them really are specific on the ratios. Any suggestions on other juices to try?