Bromopnea is the clinical term for foul-smelling breath, synonymous with halitosis. It arises when volatile sulphur compounds are released in the mouth, most commonly from bacterial breakdown of food debris and dead cells on the tongue and between teeth. Diet contributes in several ways: garlic, onions, and strong cheeses leave lingering odours; very low carbohydrate diets produce acetone breath from ketosis; and dehydration concentrates odour. Persistent bromopnea can also signal gum disease, sinus infection, or digestive disorders. Management centres on oral hygiene, hydration, and addressing underlying causes rather than masking the smell with mints.