Signs your child may have a narrow upper jaw
20 August 2026 · 4 min read
A high, V-shaped palate, snoring and crowded teeth can all point in the same direction.
What to look for at home
Look for a high, narrow or vaulted palate, teeth that overlap as they erupt, a bite where upper teeth close inside the lower ones, dark spaces at the corners of the smile, or frequent mouth breathing and snoring at night.
Why it develops
The tongue is the natural scaffold of the upper jaw. When a child breathes through the mouth, has a tongue tie, or keeps the tongue low, the palate never receives the gentle outward pressure that shapes it.
What we assess
We measure arch width, check the bite, examine tongue posture and function, and evaluate nasal breathing. That combination tells us whether expansion alone is enough or whether myofunctional therapy should run alongside it.
Questions about your child's smile or breathing?
Book an online consultation or visit one of our clinics for a full orthodontic and airway assessment.
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- The palatal expander: a parent's complete guideWhat an expander is, how the turning works, what the first week feels like and what results to expect.
- Rapid versus slow palatal expansionBoth widen the upper jaw, but they use different forces and suit different children.
- How jaw expansion can improve nasal breathingThe roof of the mouth is the floor of the nose. Widening one changes the other.