Up to 50 percent of the U.S. population reports that their own "bad breath" has concerned them during some point in the course of their lifetime. Half of this group is indeed likely to have an ongoing sporadic or a chronic breath malodor problem. This report looks at the phenomenon of malodorous breath, which oddly persists in a society rife with scientific and medical advancements. Also reviewed are the primary causes, diagnoses, treatments, and research frontiers.