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Diagnosing Hypersomnia

If you consistently feel drowsy during the day, talk to your doctor. You may be suffering from a sleep disorder called hypersomnia, which causes excessive daytime sleepiness.

To determine the cause of your sleepiness, your doctor will ask about your sleeping habits, how much sleep you get at night, if you wake up at night, and whether you fall asleep during the day. Your doctor will also want to know if you are having any emotional problems or are taking any medications that may be interfering with your sleep or may be causing you to feel sleepy during the day. You may also be asked to keep a sleep diary.

Recommended Related to Sleep Disorders

7 Myths About Sleep

By Karen Springen Stay up and read this tonight (you’ll thank us in the morning!) 1. To function best, you need to get eight hours. There's nothing magic about that number. Everyone has different sleep needs, and you'll know you're getting enough when you don't feel like nodding off in a boring situation in the afternoon, says New York University psychologist Joyce Walsleben, Ph.D., co-author of A Woman's Guide to Sleep . 2. If you can get it, more sleep...

Read the 7 Myths About Sleep article > >

Your doctor may also suggest the following tests:

  • Blood tests to rule out underlying conditions such as anemia (low blood count) or a sluggish thyroid
  • Computed tomography (CT) or MRI scans to rule out neurological issues such as multiple sclerosis
  • Polysomnography, a sleep test used to help determine the cause of many sleep problems
  • Electroencephalogram (EEG), a test which measures the electrical activity of the brain

WebMD Medical Reference

Reviewed by Melinda Ratini, DO, MS on October 07, 2014

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