Editing Insomnia (section)

=== Types ===

Insomnia can be classified as transient, acute, or chronic.
*''Transient insomnia'' lasts for less than a week. It can be caused by another disorder, by changes in the sleep environment, by the timing of sleep, severe [[Major depressive disorder|depression]], or by [[stress (biology)|stress]]. Its consequences&nbsp;– sleepiness and impaired psychomotor performance&nbsp;– are similar to those of [[sleep deprivation]].<ref name="Roth">{{cite journal | vauthors = Roth T, Roehrs T | title = Insomnia: epidemiology, characteristics, and consequences | journal = Clinical Cornerstone | volume = 5 | issue = 3 | pages = 5–15 | year = 2003 | pmid = 14626537 | doi = 10.1016/S1098-3597(03)90031-7 }}</ref>
*''[[Acute (medicine)|Acute]] insomnia'' is the inability to consistently sleep well for less than a month. Insomnia is present when there is difficulty initiating or maintaining sleep or when the sleep that is obtained is non-refreshing or of poor quality. These problems occur despite adequate opportunity and circumstances for sleep, and they must result in problems with daytime function.<ref>{{cite web |url=http://articles.directorym.com/Insomnia-a352.html |title=Insomnia&nbsp;– sleeplessness, chronic insomnia, acute insomnia, mental ... |access-date=29 April 2008 |archive-url=https://web.archive.org/web/20080329155902/http://articles.directorym.com/Insomnia-a352.html |archive-date=29 March 2008}}</ref> Hyperarousal can be linked to acute insomnia since it activates the body's fight-or-flight response. When we encounter stress or danger, our bodies naturally become more alert, which can interfere with our capacity to both fall asleep and remain asleep. This heightened state of arousal can be useful in the short term during threatening situations, but if it continues over an extended period, it can result in acute insomnia.<ref name="Acute and Chronic Insomnia: What Ha">{{cite journal | vauthors = Vargas I, Nguyen AM, Muench A, Bastien CH, Ellis JG, Perlis ML | title = Acute and Chronic Insomnia: What Has Time and/or Hyperarousal Got to Do with It? | journal = Brain Sciences | volume = 10 | issue = 2 | pages = 71 | date = January 2020 | pmid = 32013124 | pmc = 7071368 | doi = 10.3390/brainsci10020071 | doi-access = free }}</ref> Acute insomnia is also known as ''short term insomnia'' or ''stress related insomnia''.<ref name=r1>{{cite web |url=http://sleepdisorders.about.com/od/commonsleepdisorders/a/Acute_Insomnia.htm |title=Acute Insomnia – What is Acute Insomnia |publisher=Sleepdisorders.about.com |access-date=10 March 2013 |url-status=live |archive-url=https://web.archive.org/web/20130329185735/http://sleepdisorders.about.com/od/commonsleepdisorders/a/Acute_Insomnia.htm |archive-date=29 March 2013 }}</ref> 
*''[[chronic (medical)|Chronic]] insomnia'' lasts for longer than a month. It can be caused by another disorder, or it can be a primary disorder. Common causes of chronic insomnia include persistent stress, trauma, work schedules, poor sleep habits, medications, and other mental health disorders.<ref>{{Cite web |date=2020-08-31 |title=Types of Insomnia |url=https://www.sleepfoundation.org/insomnia/types-of-insomnia |access-date=2022-07-15 |website=Sleep Foundation |language=en |archive-date=2022-07-14 |archive-url=https://web.archive.org/web/20220714180512/https://www.sleepfoundation.org/insomnia/types-of-insomnia |url-status=live }}</ref> When an individual consistently engages in behaviors that disrupt their sleep, such as irregular sleep schedules, spending excessive time awake in bed, or engaging in stimulating activities close to bedtime, it can lead to conditioned wakefulness contributing to chronic insomnia.<ref name="Acute and Chronic Insomnia: What Ha"/> People with high levels of stress hormones or shifts in the levels of [[cytokine]]s are more likely than others to have chronic insomnia.<ref>{{cite news | vauthors = Simon H |title=In-Depth Report: Causes of Chronic Insomnia |url=http://health.nytimes.com/health/guides/symptoms/sleeping-difficulty/causes-of-chronic-insomnia.html |newspaper=The New York Times |access-date=4 November 2011 |url-status=live |archive-url=https://web.archive.org/web/20111108185210/http://health.nytimes.com/health/guides/symptoms/sleeping-difficulty/causes-of-chronic-insomnia.html |archive-date=8 November 2011 }}</ref> Its effects can vary according to its causes. They might include muscular weariness, [[hallucination]]s, and/or [[mental fatigue]].<ref name="Roth"/>