Thanks for query.
Bad breath can be caused by:
-periodontal or gum disease
that causes teeth to become loose, thereby creating pockets in the gums that harbour bacteria and lead to bad breath
-chronic lung or sinus infections
-breathing through your mouth because of enlarged tonsils or adenoids
-mouth infections such as thrush (candidiasis
-systemic diseases such as diabetes,
-not brushing or flossing regularly.
Gently cleaning the tongue surface twice daily is the most effective way to keep bad breath in control; that can be achieved using a tooth brush, tongue cleaner or tongue brush/scraper to wipe off the bacterial biofilm, debris, and mucus.
Since dry-mouth can increase bacterial buildup and cause or worsen bad breath, chewing sugarless gum can help with the production of saliva, and thereby help to reduce bad breath.
You can consult with the dentist
or ENT specialist
for any dental caries
and adenoids or tonsillitis.
Hope this answers your query.