Bad breath or hilatosis could be a manifestation of local (within mouth ) or systemic reasons , as the details you shared Are not enough to reach a conclusion , we can go for the most likely cause , you can get scaling (cleaning ) of your teeth done , and start using chlorhexidine mouth wash !
Next Steps
Please visit a dentist to figure out the reason for hilatosis
Health Tips
You can consume menthol as well as mint gums !