This section discusses key indicators of poor sleep quality. Red flags include: needing an alarm or snooze button to wake up, requiring caffeine to function, feeling sleepy by mid-morning, and having trouble focusing while reading. The section also highlights obstructive sleep apnea (OSA) as the most common sleep disorder in the US, affecting an estimated 25 million adults, with 80% of moderate to severe cases undiagnosed. OSA symptoms include snoring, obesity, and apneic episodes (brief breathing pauses). The section emphasizes the importance of getting evaluated if any symptoms are present, as untreated OSA can lead to complications like high blood pressure and heart failure