Hello  first step  is have to go for  cleaning of your  teeth if the  problem  persists  we have  to check  your  diet chart any foods particular  causing the  issue  or sometimes  tonsillitis and gastric cause the bad breath.tell us about your  history  so we can guide  you to  overcome the issue.

The most common cause of bad breath is tartar and plaque deposits on the teeth. Get your scaling and polishing done. Ideally it is recommended everyone should get their scaling done once a year. Dry mouth can lead to bad breath. Also nose block due to allergies causing mouth breathing can also cause bad breath