Jaw chewer

No one knows for sure. There is no 100 percent certainty on who will or won't get cancer. Yes smoking and chewing can increase your chances but that is it. It does not state you will get it.

If you smoke you're already halfway to some kind of health issues anyway. This is really more of a problem than chewing your jaw.... Your probably suffering some form of stress, and should think about addressing some of your issues that maybe casuing you stress. (Both smoking and habits like chewing your jaw might indicate stress) Forget the symptoms and concentrate on the cause, if you can do something about the stress you can address the habits later on... Don't mean to sound simplistic, I know there could be very involved reasons for the stress, I'm just trying to help....