There are several ways to treat severe bad breath. First you should look for the cause of bad breath and treat it. It may be respiratory causes or digestive causes, most of the bad breath is caused by too much tartar buildup, that is, too much plaque deposition, the formation of foul-smelling bacteria imbalance, so the bad breath taste will be serious. Treatment can be scaling plus scraping, and if necessary, periodontal flap surgery can be used to clarify the location of the tartar and remove the inflammation around the teeth. When the inflammation around the teeth disappears, the taste of bad breath will decrease naturally. In addition, bad breath can also occur when there is decay in the teeth and food impaction, visit the endodontist to treat the affected teeth. Regular checkups have direct relevance for patients with bad breath.