Snoring is the sound of partially obstructed breathing during sleep. While some snoring can be harmless, it can also be the sign of a more serious medical condition known as Obstructive Sleep Apnea (OSA). When Obstructive Sleep Apnea occurs, the tongue and soft palate collapse onto the back of the throat and completely block the airway, which restricts the flow of oxygen. The condition known as Upper Airway Resistance Syndrome (UARS), is midway between primary snoring and true obstructive sleep apnea. People with UARS suffer many of the symptoms of OSA but require special sleep testing techniques.
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