Reports
suggesting halitosis originating from the respiratory tract are
on chronic (rhino)sinusitis, chronic tonsillitis, tonsillithiasis,
nasal obstruction, a foreign body in the upper respiratory tract,
nasopharyngeal abscess, and a Zenker’s diverticle.Reports
suggesting halitosis originating from the gastrointestinal tract
and systemic diseases are on inflammatory bowel disease,
Helicobacter pylori infection, gastritis, (extra)oesophageal reflux
disease, and diabetes mellitus