Do you wake in the morning and realize that your mouth always seems dry? Or maybe you wake and feel more tired than usual. The culprit could be your breathing. Breathing not only provides your body with the oxygen it needs to survive, it also allows you to release carbon dioxide and waste. You have two air passageways to your lungs—the nose and mouth. Healthy people use both airways to breathe. So, what can it mean if you are only breathing one way? Read on to find out.