08/31/2026
A child’s mouth is supposed to stay closed at rest.
And mouth breathing doesn’t always look obvious.
Sometimes it’s the child whose mouth is hanging wide open. But sometimes it’s much more subtle — the lips are just slightly parted.
Both can be signs of mouth breathing.
When the mouth is habitually open, it can affect more than breathing. Over time, it may influence tongue posture, oral and facial development, sleep quality, and overall airway health.
And here’s the important part: we don’t just want to tell a child to “close your mouth.”
We want to ask WHY their mouth is open in the first place.
Can they breathe comfortably through their nose?
Is there chronic congestion?
Are the tonsils or adenoids enlarged?
Is the palate narrow?
Is tongue posture playing a role?
👀 Take a look at your child when they’re watching TV, riding in the car, doing homework, or sleeping.
Are their lips comfortably closed — or even slightly open?
Sometimes the smallest signs tell us the most.