Disrupted sleep patterns happen to everyone at one time or another because of temporary factors, like a snoring partner or medication. Unfortunately, there are other factors, like stress, that can cause sleep patterns to disrupt, sometimes over a long time.
The typical adult needs slightly more than 8 hours of sleep every day, but fewer than 35% of American adults get this level of rest. Actual insomnia is defined as difficulty initiating, or maintaining sleep 3 or more nights in a week, in addition to sleep related daytime impairment. Typically, someone with insomnia feels unrefreshed when they wake, can’t get to sleep despite being really tired, has daytime drowsiness or fatigue, sometimes has difficulty concentrating, sometimes gets headaches.