Sleep Apnea: Many people snoring while sleeping.

If you have obstructive sleep apnoea your breathing pauses for brief periods while you are sleep. Normally you breathe in air flows in through your mouth and nose and your throat also called the Pharynx air. Then flows down your windpipe or trachea spreading through a tree-like structure of smaller tubes into your lungs.

Each time you breathe in negative suction pressure pulls the soft tissue in your mouth and pharynx inward. If you have obstructive sleep apnoea the muscles of your mouth and pharynx may relax too much your tongue drops on to the soft tissue in the roof of your mouth pressing. 

You may gasp for air to re-establish airflow before falling asleep again the cycle of apnea and waking up may happen many times at night preventing restful sleep. Sleep apnea includes obesity because of more fat. A small or receding jaw with a narrowed airway.  

Left untreated obstructive sleep apnea may be lead to complications such as high blood pressure, heart disease, irregular heartbeats, called arrhythmias, stroke, and diabetes.