Insomnia - Wikipedia
https://en.wikipedia.org/wiki/Insomnia
WEBInsomnia, also known as sleeplessness, is a sleep disorder where people have trouble sleeping. [1] . They may have difficulty falling asleep, or staying asleep for as long as desired. [1] [9] [11] Insomnia is typically followed by daytime sleepiness, low energy, irritability, and a depressed mood. [1] .
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