Sleep apnea is a condition that causes repeated cycles of breathing interruptions during sleep. If left untreated, sleep apnea may lead to dangerous health complications related to oxygen deprivation. Explore sleep apnea , its symptoms like snoring, causes, diagnosis methods, and treatments including CPAP for better sleep quality. Sleep apnea is a serious condition that happens when your breathing stops and starts during sleep. Learn more about causes, symptoms, diagnosis, and treatment. Sleep apnea is a common condition that occurs when your breathing stops and restarts many times while you sleep. Learn about the causes, symptoms, and treatments of sleep apnea .