Sleep Apnea - An Overview What is Sleep Apnea? Sleep apnea, mainly obstructive sleep apnea (OSA), happens when your airway blocks during sleep. This obstruction can happen lot of times a night. It interrupts your sleep and cuts off oxygen to your body. The National Institute of Health states 1 https://sleepapneatreatmenthousto39360.alltdesign.com/a-secret-weapon-for-what-is-deviated-septum-50411897