Are there any natural treatments? 

Bad Breath – What are the Natural Treatments? Having bad breath is a common complaint that afflicts many people. It is caused by the presence of bacteria in the oral cavity. Bacterial growth can occur due to many reasons, and in many places that may cause a foul odor to emanate from your mouth. Usually the most common reason is infrequent brushing leading to bacterial decomposition of leftover food particles in your mouth and in between your teeth.    

Also, certain kinds of food like garlic and onion tend to make your mouth smell as they themselves have strong odors. The disintegrating food particles may cause foul odors to emanate from your mouth, from the skin of your tongue, the gaps in your teeth from under the gums.    

Bad breath is caused by a variety of factors, the primary one being the breakdown of proteins from food particles in the mouth by bacteria. Certain kinds of food and drink are also responsible as they have strong smells as well, like onions, cheese, tobacco, and garlic.    

Bad breath may also be caused by throat infections, dental decay, worms in the intestinal tract, constipation, gum diseases, gastritis, and accumulation of food between the teeth. In short, any sort of bacterial build up in the gastrointestinal tract can lead to bad breath.