Teeth grinding or bruxism can be a bad habit that both kids and adults may have. Stopping such a habit right away is important in protecting your teeth. Grinding your teeth can wear your teeth down over time. Teeth grinding can also cause your teeth to crack and brake. Most often teeth grinding can be caused by stress and sleeping habits.
If your child is grinding their teeth in their sleep it can be harder to control. However there are dental night guard that can prevent grinding while sleeping. Talk to your dentist if you or your child grind your teeth.