Why do babies grind their teeth?

GraceWhy do babies and kids teens grind their teeth?
Alyssa: Doctors don't know exactly why babies grind their teeth. It may be an attempt to soothe their sore gums during teething, or to ease the discomfort of an earache. Allergies may also be to blame in some infants. Babies may also grind because their top and bottom teeth aren't properly aligned.