At various points in our lives, all of us suffer from a lack of sleep that can be remedied by making sure 
we have the opportunity to get enough sleep. But, if you are spending enough time in bed and still wake up tired or feel very sleepy during the day, you may have a sleep disorder.
One of the best ways you can tell if you are getting enough good quality sleep, and whether you have signs of a sleep disorder, is by keeping a sleep diary. After a week or so, look over this information to see how many hours of sleep or nighttime awakenings the night before are linked to your being tired the next day. This information will give you a sense of how much uninterrupted
sleep you need to avoid daytime sleepiness. You can also use the diary to see some of the patterns or practices that may keep you from getting a good night’s sleep.
You may have a sleep disorder and should see your doctor if your
sleep diary reveals any of the following:
- You consistently take more than 30 minutes each night to fall
asleep.
- You consistently awaken more than a few times or for long
periods of time each night.
- You take frequent naps.
- You often feel sleepy during the day—especially if you fall
asleep at inappropriate times during the day.
