Nose Odor Turning into Bad Breath? The Hidden Cause of Halitosis in Rhinitis and Sinusitis Patients and Its Solutions

How can the wisdom of the Donguibogam be interpreted in modern medicine? The answer lies in the scientific mechanism of halitosis caused by chronic rhinitis and sinusitis. The nose and paranasal sinus are crucial organs that purify and regulate the temperature of the air we breathe, but when chronic inflammation develops here, several problems follow. First, continuous inflammation of the nasal mucosa and paranasal sinus mucosa leads to excessive mucus secretion, turning the mucus thick and dense. The phenomenon where this mucus continually flows down the back of the throat is called postnasal drip. This postnasal drip easily adheres to the tonsil or the root of the tongue at the back of the oral cavity, which is already an environment where bacteria thrive. Furthermore, because the mucus itself is rich in protein, it serves as an ideal food source for anaerobic bacterium species in the oral cavity. As these bacteria break down the protein in the mucus, they produce foul gases called volatile sulfur compounds, which become the main culprits of bad breath. This often smells like rotten eggs or sewage. Additionally, severe nasal congestion naturally leads to mouth breathing, which induces oral dryness. Saliva serves to wash away and neutralize bacteria in the oral cavity, so reduced saliva secretion encourages more active bacterial proliferation, potentially worsening halitosis. Furthermore, chronic inflammation of the nose and paranasal sinus lowers the local immune response, adversely affecting the balance of microorganisms in the oral cavity and contributing to overall halitosis aggravation. Recent studies suggest that chronic inflammation of the nasal mucosa goes beyond a simple local disease and may also be linked to a systemic inflammatory response. The nose and brain are closely connected in neurology, and damage to the olfactory nerve can prevent individuals from perceiving their own bad breath. In short, what the Donguibogam described as damp-heat or gallbladder fire can be explained in modern medicine through complex mechanisms such as chronic inflammation, bacterial imbalance, postnasal drip, and dry mouth. This reminds us of how vital nasal health is, not just for breathing, but for the overall balance and cleanliness of our body.