first off- blood anywhere where it is not supposed to be is a indicator that it is time to call your doctor. period. no discussion other than with a qualified physician. unless of course you want to die. now as for trying to blame vaping on this condition, well that's just pure ignorance. take responsibility for the years we used tobacco products. just because we stopped smoking and switched to vaping doesn't mean we are not going to get cancer. choices and consequences. anybody who is over the age of 25 should be able to grasp the basic premise of that. we all knew these things were bad for us. we have no one to blame but ourselves. but to be able to reduce of the amount of days we are going to spend gasping for our last breaths?, that's a no brainer. as with everything else trial and error works best with this stuff.