A condition called Zenker’s diverticulum is yet another cause of bad breath. A diverticulum is a small pouch, and with this condition, the pouch sticks out from the back of the throat and adjacent part of the esophagus. It usually forms later in life, and the affected people usually complain about food sticking in their throats. Usually, the food is stuck in the pouch, and is actually undergoing digestion there. Sometimes, the partially digested food is regurgitated back into the mouth, thus causing halitosis. Furthermore, the sufferers of this condition may have coughing and choking as symptoms.
Surgery can be performed in order to fix this problem, and this can be done by making small incisions, and the pouch can be removed with special instruments and a scope. Sometimes the pouch can be removed without any incision, and the scope being sent down the throat.
Keep in mind, though, Zenker’s diverticulum is rare, and halitosis is common.