Infants are primarily nasal breathers, a physiological adaptation that allows them to feed and breathe simultaneously. The preference for nasal respiration provides benefits such as filtering, warming, and humidifying incoming air. However, circumstances arise where oral respiration becomes necessary or habitual.
Mouth breathing in infants is often indicative of nasal congestion caused by illness, allergies, or anatomical obstructions. Persistent oral respiration can lead to developmental changes in the oral cavity and facial structure, impacting dental alignment and potentially contributing to sleep-disordered breathing. Understanding the underlying causes is crucial for addressing the issue and mitigating potential long-term consequences.