Obstructive sleep apnea is a condition in which there is complete blockage of airflow into the lungs during sleep. Snoring, in contrast, occurs when there is partial collapse of the airway and either the tongue or the roof of the mouth flutters against the back of the throat. An overnight study in a sleep disorders center may be necessary to be sure that a snorer doesn't have sleep apnea. Snoring is much more common in overweight people. Even a modest weight loss can reduce its intensity.
Difficulty breathing through the nose can also worsen snoring.
Nasal air flow may be improved by various medications, breathing strips applied to the nose, or surgery to enlarge the nasal airway. Various dental appliances are also available, that keep the lower jaw forward and help prevent snoring. Finally, snoring is much more common when sleeping on one's back, so anything used to reposition the snorer may be useful. If all these measures fail, surgery may be helpful in reducing snoring. Most surgical methods try to decrease vibration of the roof of the mouth, a region called the soft palate.