Hi,
Thanks for asking the query,
Bad breath occurs due to plenty of reasons like poor
oral hygiene, plague and calculus deposition, GIT disturbances,
Sinusitis, tongue coatings, decayed tooth, oral pathological conditions.
I would suggest you to visit to a
Dentist and get a checkup done.
Go for complete mouth scaling and polishing every six months.
Develop a habit of brushing teeth twice daily, use interdental toothbrush, floss.
Use antiseptic mouthwash rinses twice daily.
Maintain a very good oral hygiene.
If there are any decayed tooth then get it restored.
Avoid alcohol consumption, smoking.
Hope this helps out,
Regards..