There's a definite connection between dry mouth and morning breath, a type of bad breath almost all of us have experienced. Dry mouth happens when too little saliva is produced. Saliva is rich in oxygen, so a good flow of saliva introduces plenty of oxygen into the oral cavity, and this is exactly what anaerobic micro-organisms don’t like. Given the presence of enough oxygen, these micro-organisms don’t multiply as quickly and this diminishes or even eliminates chronic halitosis in many instances. So rinse your mouth frequently with lots of water and try an oxygenating rinse made especially for the purpose of suppressing anaerobic bacteria.