Obstructive sleep apnea - adults: MedlinePlus Medical Encyclopedia

Obstructive sleep apnea (OSA) is a problem in which your breathing pauses during sleep. This occurs because of narrowed or blocked airways.

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As a stomach sleeper for 20 years, I had no problems, but now I must sleep on my back. I have a blocked nose and mouth breathing. Can this change of position be the cause of this breathing problem? - Quora

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