Continuous positive airway pressure therapy (CPAP) uses a machine to help a person who has obstructive sleep apnea (OSA) breathe more easily during sleep. A CPAP machine increases air pressure in your throat so that your airway doesn't collapse when you breathe in. When you use CPAP, your bed partner may sleep better too.

CPAP is the most effective and popular nonsurgical option for sleep apnea. Over time, most people experience less daytime sleepiness, lower blood pressure, and will have less risk of stroke, heart disease, and depression.