“He’s always had his mouth open” is a comment we hear often at our Falcon office, usually said in passing rather than as a concern. It should be treated as one. Persistent mouth breathing is one of the earliest visible signs that a child’s airway or jaw growth needs a closer look, well before crowding or an obvious bite problem shows up.

Here’s the mechanism: nasal breathing keeps the tongue resting against the roof of the mouth, and that steady resting pressure is a key driver of how wide the palate grows. When a child breathes through the mouth instead, the tongue drops low, that shaping pressure disappears, and the palate tends to narrow and arch upward instead of widening properly. A narrower palate means a narrower nasal airway directly above it — often making nasal breathing harder still, which reinforces the mouth-breathing pattern.

What to watch for:

• Open-mouth posture during sleep or at rest during the day
• Snoring or frequent nighttime waking
• Chapped lips or a dry mouth first thing in the morning
• Dark circles or shadowing under the eyes
• A face that looks noticeably longer and narrower than expected for their age

Dr. Zitterkopf evaluates airway and jaw growth as a standard part of every pediatric orthodontic exam at our Falcon office — not an optional add-on. Identifying a narrowing palate between roughly ages 6 and 9 usually means we can guide growth with an expansion appliance while the bone is still developing, rather than waiting for a more invasive correction later.

Since mouth breathing is typically a symptom rather than the root cause, we frequently coordinate with a local ENT to rule out enlarged tonsils, allergies, or nasal obstruction before or alongside treatment.

If your child breathes through their mouth more often than their nose, don’t assume it’s just a phase. Schedule an evaluation at our Falcon office and we’ll help you understand what’s actually driving it.