As we already knowย you have certain bad bacteria to blameย for a less than attractive odor comingย from your mouth. They thrive without oxygen. Soย getting enough of it the right way canย help combat the problem. Can there be a wrong way to get oxygen? Yes,ย there can be. The proper way to getย oxygen into your system is through yourย nose instead of through your mouth. Your nasalย passages produce nitric oxide,ย whichย helps the delivery of oxygen to yourย cells. When you breathe through yourย mouth,ย cold dry air goes into your lungsย and your body gets less of it. When you breathe through yourย mouth during sleep, you can often wake up with the morningย breath that makes you want to cover yourย mouth before you talk to any otherย humans. Some people also tend to breatheย through their mouthsย during the day.