I have a perpetual cheek-biting habit. i can feel the scars from it. also, i'm working on quitting snus use. will the mouth tissue repair itself?

Yes: Particularly if you quit using snuff. May need a nightguard to help control nighttime clenching and grinding.

Yes it well : Heal evantually , as long as you quit both biting and snuf use, if biting your cheeks accompanied by teeth grinding, then night gaurds may be needed

Cheek biting: Your body should repair itself in time but without actually seeing you in person we can't determine any contributing factors such as a poor bite (malocclusion), rough edges of teeth or fillings; or any other dental or medical issues. See a dentist for an evaluation.