What Is Sleep Apnea?
By Lynn MarksMedically Reviewed by Sanjai Sinha, MD
If you have this condition, you may feel exhausted during the day — even after a full night's rest.
Sleep apnea is a disorder that causes you to stop breathing, or have very shallow breathing, while you sleep.
This pause in breathing can last for seconds or minutes and may occur 30 or more times in an hour.
https://www.everydayhealth.com/sleep-apnea/guide/