Bad Breath

bad breath

Respiratory tract infections such as flu, bronchitis and sinusitis are the main causes of bad breath. When respiratory tract infections disable or inflame the tissues of the respiratory system, cells and mucus are produced that feed on the bacteria. Allergies and discharge from the back of the throat can also lead to discomfort that blocks the nasal passages. This stuffy nose forces you to breathe through your mouth, which causes dry mouth and bacteria growth in your mouth, resulting in bad breath