If you have OSA, (Obstructive Sleep Apnoea), you stop breathing repeatedly during sleep because your airway collapses. Upper Airway collapse may be due to decreased muscle activity, increased tissue around the airway, or structural features that lead to a narrowed airway. As a result, air is prevented from getting into the lungs, carbon dioxide levels in the blood rise and sleep is disrupted.

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A sleep specialist explains what OSA is and how it can be treated.