At what age does teeth grinding start?

When Does Teeth Grinding Start in Children?

Many parents are surprised to hear a faint grinding sound coming from their little one’s crib — sometimes as early as 6 months old. That’s right: teeth grinding, also known as bruxism, can begin just as a baby’s first tooth breaks through the gums. While it might sound alarming, it’s actually quite common during infancy and toddlerhood.

Teeth grinding often emerges around the same time as teething, and though the exact cause isn’t always clear, experts believe it may be linked to the discomfort of new teeth coming in or the adjustment of jaw alignment. Some babies also grind their teeth while falling asleep or during deep sleep phases, much like adults who clench under stress — though stress is unlikely the trigger at this young age.

As children grow, this habit frequently comes and goes. Most toddlers who grind their teeth do so without any long-term issues, and the behavior typically fades by the time they reach school age. Still, if you notice excessive wear on the teeth, complaints of jaw pain, or if the grinding persists past early childhood, it’s worth mentioning to your pediatric dentist.

For now, there's usually no need to worry. Occasional grinding is a normal part of development for many young children. It’s just one of the many quirks parents encounter as their little ones grow and adapt to a world full of new sensations — including the feel of teeth meeting for the very first time.