06/15/2026
Chronic mouth breathing is not simply a “bad habit.” In both children and adults, it is often associated with altered oral resting posture, airway dysfunction, poor sleep quality, and changes in craniofacial development over time.
Low tongue posture and chronic open-mouth posture may contribute to:
• Narrowing of the upper airway
• Retruded jaw development
• Dark circles/facial fatigue
• Teeth grinding/clenching
• Orthodontic relapse
• Poor sleep quality
• Forward head posture
• Attention/behavior concerns in children
• Fatigue and non-restorative sleep in adults
The face develops in response to function. Nasal breathing supports appropriate tongue posture, airway development, facial balance, and more efficient oxygen exchange.
This is why evaluating function matters.