More persistent problems with unpleasant breath can indicate diseases such as diabetes, liver dysfunction, pulmonary disease, and respiratory disease. Periodontal pockets, the spaces that form between the teeth and gums, are another source of bad breath. These pockets, which occur in the latter stage of periodontal disease, create spaces for bacteria to grow, and give off a chronic unpleasant odor. Dental work may be required in order to remove these pockets of bacteria. Periodontal disease is detected by the presence of bleeding gums, loose teeth, receding gums, or pain when chewing.

For more information on this condition, please refer to the Periodontal Disease section of our Patient Education Library.