What causes snoring?
While we are breathing, air flows in and out in a steady stream between our nose or mouth and our lungs. There are relatively few sounds when we are sitting and breathing quietly. When we exercise, the air moves more quickly and produces some sounds as we breathe. This happens because air is moving in and out of the nose and mouth more quickly and this results in more turbulence to the airflow and some vibration of the tissues in the nose and mouth.
When we are asleep, the area at the back of the throat sometimes narrows as the muscles relax, and even close off temporarily. The same amount of air passing through this smaller opening more rapidly can cause the tissues surrounding the opening to vibrate, which in turn can cause the sounds of snoring. Different people who snore have different reasons for the narrowing. The narrowing can be in the nose, mouth, or throat. Palatal snoring is often worse when an individual breathes through his or her mouth or has nasal obstruction.