Halitosis

Persistent unpleasant breath odor. Possible causes are intraoral disorders (tongue bacteria, poor oral hygiene, gingivitis, periodontitis, xerostomia, caries, defective dental crowns), throat disease (tonsilloliths, tonsillitis, sinusitis, post-nasal drip, bronchitis), systemic disorders (acid reflux, ketoacidosis, liver/kidney failure), or lifestyle factors (garlic, onions, spice, tobacco, alcohol).