Thnaks for asking the query,Bad breath
occurs due to various reasons few are GIT disturbances, decayed tooth, hormonal imbalance, tongue coatings, xerostomia
or dry mouth, sjogrens syndrome, oral pathological conditions.
A thorough clinical examination by the Dentist
and Physician is required.
Maintain a good oral hygiene
Take antiseptic mouthwash rinses.
Clean the tongue with a tongue scraper or a soft bristle toothbrush.
Take complete balanced diet with lots of fibrous foods
Drink plenty of water and keep yourself hydrated.
Go for complete mouth scaling and polishing.
If any decayed tooth get it restored.
Hope you find this as helpful,