Why Do Teens Have Trouble Sleeping?

Research shows that teens need 8 1/2 to more than 9 hours of sleep a night. You don't need to be a math whiz to figure out that if you wake up for school at 6:00 AM, it means you have to go to bed at 9:00 PM to reach the 9-hour mark. Studies have found that many teens, like Garrett, have trouble falling asleep that early, though. It's not because they don't want to sleep. It's because their brains naturally work on later schedules and aren't ready for bed.
During adolescence, the body's circadian (pronounced: sur-kay-dee-un) rhythm (sort of like an internal biological clock) is reset, telling a teen to fall asleep later at night and wake up later in the morning. This change in the circadian rhythm seems to be due to the fact that melatonin, a hormone that regulates sleeping and waking patterns, is produced later at night in teens than it is for kids and adults, making it harder for teens to fall asleep. This phenomenon has a medical name: delayed sleep phase syndrome. Although it's common, delayed sleep phase syndrome doesn't affect every teen.
Changes in the body clock aren't the only reason teens lose sleep, though. Lots of people have insomnia - trouble falling or staying asleep. The most common cause of insomnia is stress.But all sorts of things can lead to insomnia, including physical discomfort (the stuffy nose of a cold or the pain of a headache, for example), emotional troubles (like family problems or relationship difficulties), and even sleeping environment (a room that's too hot, cold, or noisy).
It's common for everyone to have insomnia from time to time. But if insomnia lasts for a month or longer with no relief, then doctors consider it chronic. Chronic insomnia can be caused by problems like depression. People with chronic insomnia can often get help for their condition from a doctor, therapist, or other counselor.
For some people, insomnia can be made worse by worrying about the insomnia itself. A brief period of insomnia can build into something longer lasting when a person becomes anxious about not sleeping or worried about feeling tired the next day. Doctors call this psychophysiologic (pronounced: sye-ko-fih-zee-uh-lah-jik) insomnia.
There are a number of other conditions that can disrupt sleep in teens. They include: