How do I know if I am getting enough sleep?

The most reliable sign is how you feel during the day. If you wake up feeling refreshed, can stay alert and focused throughout the day without relying on caffeine, and don't feel an overwhelming urge to nap, you're likely getting enough sleep. Most adults need 7 to 9 hours per night, though individual needs vary. Warning signs that you're not getting enough include difficulty concentrating, irritability, frequent yawning, falling asleep quickly after lying down, or needing an alarm clock to wake up every day. If you consistently feel tired despite spending enough time in bed, it may point to a sleep quality issue like sleep apnea, and you should consult a doctor.