Different people who snore have different reasons for the narrowing. The narrowing can be in the nose, mouth, or throat.
- On the lateral side (the wall of the nose closer to the cheeks) of each passage, there are three nasal turbinates, which are long, cylindrical-shaped structures that lie roughly parallel to the floor of the nose. If the blood vessels in the turbinates increase in size, the turbinate as a whole swells, and the flow of air decreases.
- The soft palate is a muscular extension of the bony roof of the mouth (hard palate). It is shaped like a sheet attached at three sides and hanging freely in the back of the mouth. If it is too long or floppy, it can vibrate and cause snoring.
- The uvula is the small extension at the back of the soft palate. It assists with the function of the soft palate. The uvula is suspended from the center and back of the soft palate. An abnormally long or thick uvula also can contribute to snoring.
- The tonsils are designed to detect and fight infections often, the tonsils do not return to their normal size after the infection is gone. They can remain enlarged (hypertrophied) and can narrow the airway vibrate, and cause snoring.
- The base of the tongue is the part of the tongue that is the farthest back in the mouth. The tongue is a large muscle that is important for directing food while chewing and swallowing. If the back of the tongue is large or if the tongue is able to slip backwards, it can narrow the space through which air flows in the pharynx, which can lead to vibrations and snoring.