i have a white streak like scar on the side of my tongue and i'm not sure if i'm biting my teeth in my sleep or if it is from a previous tongue piercing (that i got rid of), i have however gotten one removed on the other side of my tongue and it never came back. I do get really small white patches every once and awhile on the side of my tongue that do disappear however this streak of a scar type of thing wont go away. i have the cleanest mouth too. i brush twice a day and floss once a day. i brush my tongue everyday too. some people say i have the cleanest teeth they've seen. but i'm worried about these scars coming back in the future, and i hear they turn into cancer.. :( which i am scared about. what can i do???? :( :(