teeth grinding is something that can be fairly common for children and adults
. Often, people grind their teeth
when they are stressed out about something or anxious. It can be difficult to address this issue with a 4 year old though. Are you aware of anything that may be causing some anxiety? A new routine like beginning pre-school, a move to a new location, house, etc?
If it really becomes a problem, you can take him to the dentist and they can fit him for a mouth guard...