Insomnia is the inability to sleep. If you have difficulty falling asleep, or staying asleep, this can be considered insomnia. Stress causes something called hyperarousal, which can affect the good balance between sleep and wakefulness. With insomnia, you may not only have trouble getting to sleep, and stay asleep, but you often wake up too early and not feel rested. You will feel tired in the daytime and have a feeling of sleepiness. This can affect your day-to-day activities as you may have difficulty paying attention or focusing on tasks, it can lead to irritability and anxiety, even depression. Mostly you will be worrying about all the sleep you are not getting, which leads to more stress.
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