<https://vardsurgentpsych.com/insomnia-types-symptoms-causes-and-treatments/#primaryimage>
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"Insomnia is a frequent sleep issue that makes it difficult to get asleep, difficult to remain asleep, or causes you to wake up too early in the morning and be unable to fall back asleep again. When you first open your eyes, you may find that you are still lethargic. Insomnia depletes your level of energy and mood, but it may also negatively impact your wellness, job performance, and life quality."
<https://vardsurgentpsych.com/insomnia-types-symptoms-causes-and-treatments/>