M.R.
Hi M.,
This is not the kind of "habbit" you imatate and pick up that way, but it does run in families. If he has not been to a dentist, make him an appointment. If he is not doing it at night, they may not worry about it at all. I grind and I see a dentist who specializes in this, and now he is treating one of my daughters for the same problem. She will get braces to try and restructure her jaw line so that she does not feel the need to grind her teeth. It may be a long time before they can do anything. Our dentist susgested that we give her a multi vitamin, and that she reduce her sugar intake, both contriute to grinding in kids.
hope that helps
M.