Allergies
If you are suffering from allergies and respiratory issues, your stuffy noses might cause mouth breathing, thus reducing saliva production and drying out your tissues. This is certainly one of the leading causes of bad breath. More importantly, postnasal drips would cause stinks and stuck on your tongue’s back, making it extremely difficult to clean with a toothbrush. In these cases, it is recommended to crape these areas with a scraper or rinse with chlorine dioxide mouthwashes. [8]
