Hello and welcome to HCM,
Bad breath from oral cavity is called halitosis.
The common causes of halitosis is poor oral hygiene
, gum inflammation
, dental caries
, any abscess in the oral cavity.
Go for a complete dental check up to look for any dental caries or gum infection
Learn the correct technique of brushing. Brush twice daily once after breakfast and once after dinner.
Floss your teeth regularly.
Avoid odoriferous food items during day like onion.
Rinse your mouth regularly after eating anything.
Use mouth fresheners at regular intervals.
Try all these measures and observe the results.
Thanks and take care
Dr Shailja P Wahal