Stomatodysodia is the technical medical term for halitosis — persistently unpleasant breath. The great majority of cases originate in the mouth itself: bacteria on the tongue, between teeth, and below the gum line break down food debris and dead cells, releasing volatile sulphur compounds that smell of rotten eggs. Poor oral hygiene, gum disease, dry mouth, and smoking are the main contributors. Less commonly, the odour comes from further afield — sinus infections, tonsil stones, acid reflux, or systemic conditions such as uncontrolled diabetes and liver or kidney disease, each with its characteristic smell. Management starts with thorough oral hygiene, tongue cleaning, and dental treatment, with medical investigation reserved for cases that do not respond.