Insomnia is a common sleep disorder that can make it hard to

fall asleep, hard to stay asleep, or cause you to wake up too early and not be able to get back to sleep. You may still feel tired when you wake up. Insomnia can sap not only your energy level and mood but also your health, work performance and quality of life. How much sleep you need varies from person to person, but most adults need at least seven to eight hours a night.
If insomnia makes it hard for you to function during the day, see your doctor to identify the cause of your sleep problem and how it can be treated.