Know Your Nose: A Narrative Review of Developmental, Functional, Impact, and Importance of Nose and Nasal Breathing on Health and Emotional Wellbeing

This narrative review synthesizes research demonstrating the multifaceted role of nasal breathing in human health and wellbeing across developmental, physiological, immunological, and neuropsychological domains. Nasal breathing emerges as fundamental to infant development, enabling correct breastfeeding mechanics and contributing to proper maxillofacial growth. Nasal structures condition and thermoregulate inhaled air while providing immune defense through nitric oxide production in the paranasal sinuses, mucosal immune barriers, and physical particle filtration. Through nitric oxide, olfaction, and vagal stimulation, nasal breathing influences autonomic and emotion regulation, cognitive performance, and aspects of consciousness. Notably, many traditional spiritual practices, including yogic pranayama, Sufi traditions, and meditative breathing techniques, have long emphasized nasal breathing for physical and psychological wellbeing. Contemporary scientific evidence increasingly validates these ancient practices, revealing how specific breathing patterns enhance parasympathetic tone, increase heart rate variability, and promote physiological and psychological balance. This convergence of traditional wisdom and modern neuroscience affirms the import traditional spiritual practices have long attributed to nasal breathing, with implications for clinical practice, developmental health, and contemplative traditions. Understanding nasal breathing’s multifaceted role across these domains can inform interventions that work with the body’s natural regulatory mechanisms.