In most of us, the tongue is probably the major source of oral malodor and bad breath. Here is small tip on how to smell on your own: Stick out your tongue as far as it will come out, and lick one of your wrists with your own saliva. Wait five seconds, and smell. You will be surprised to find that even you have your own odor.

Strangely, the smell of the front end of the tongue isn’t the real problem. It is at the deepest part of your mouth, towards your throat. In many people with bad breath, there will be a yellowish mucous on the back of the mouth and this can be collected with a scrapping of the posterior surface of the tongu