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What Is Insomnia? Symptoms, Causes, Diagnosis, Treatment, and Prevention

You know how awful one night of bad sleep can make you feel. Now multiply that one bad night by weeks, even months, and it’s easy to understand why insomnia can take a tremendous mental and physical toll on people.

By definition, even having just a few restless nights of sleep qualifies as a bout of insomnia. (1) In and of itself, a night or two of bad sleep isn’t a critical problem. But one or two nights of bad sleep can easily turn into a persistent problem. And it’s the repetitive nights of continued sleep woes that are the biggest drain on the body and brain.

RELATED: What Happens to Your Body and Your Mind When You Don’t Sleep

If you struggle to sleep, you’re not alone. Estimates suggest approximately 10 percent of adults suffer from chronic insomnia, and between 15 and 35 percent of adults suffer from some level of short-term insomnia lasting anywhere from a few days to up to three months. (2)

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