Snoring
Nasal breathing is normal, because the nose provides filtration, moisture and temperature control to breathing air. When nose is congested, the mouth opens, blocking the air passages due to tongue falling back. Mouth breathing for long time changes the shape of palate and throat. Fluttering of the soft palate produces the sound of snoring.
Obesity can worsen the airflow further by making airways more floppy. Though not everyone with snoring or sleep apnea is obese.
