Mouth Breathing – Your nose is meant for breathing. Your mouth is not. However, if your airway is not healthy, your body compensates by forcing you to breathe through your mouth. This is a problem because your nose has special mechanisms to filter the air you take in, removing microscopic contaminants that your mouth does not. Additionally, your nasal passages connect to your sinuses, which are a crucial part of the breathing process. When you bypass your sinuses by breathing through your mouth, the air you breathe in is not as moist, rich, or clean. Additionally, mouth breathing causes the soft tissues inside your mouth to dry out, making it much more possible for bacteria to cause infection. A dry mouth also means no saliva, which is essential for fighting off plaque-causing bacteria. Adults and children who breathe mainly through their mouths often develop chronic sinus problems, suffer from upper respiratory infections more frequently, experience tooth decay to a higher degree, and develop gum disease at a higher rate.