3. Throat and Nose Structure: Structural issues within the body can produce the obstructed or uneven air flow which causes snoring. These include nasal polyps, a deviated septum, scar tissue and large adenoids, tonsils, tongue or uvula (that little thing that hangs down in the back of your throat).
4. The Common Cold, Flu and Infection: Sinus congestion and nasal stuffiness constrict the nasal passages causing one to breathe through the mouth. When this occurs during sleep, it can result in snoring.
5. Allergies: Many allergy symptoms are caused by inflammation, including itchy, watery eyes, runny nose, sinus pain and headaches. This inflammation swells the tissue around the throat and sinuses and also causes excess mucus. This condition blocks the airway.