Additional oral sources of bad breath include poor oral hygiene (especially if it leaves proteinaceous particles between teeth), gum inflammation, faulty dental work, unclean dentures, and abscesses.

• 其他的口腔问题也会引起口臭，包括不良的口腔卫生习惯（尤其是牙缝间残留蛋白质食物颗粒）、牙龈发炎、不当的牙齿修补、不洁假牙以及脓疮。