Editing Hypothermia (section)

==Classification==
{| class="wikitable" style="max-width: 22em; float: right; clear: right; margin: 0 0 0.5em 1em;" 
|+ Hypothermia classification
|-
!Swiss system<ref name="NEJM 2012" />!!Symptoms!!By degree<ref name="Rosen 2006">{{cite book |title=Rosen's emergency medicine: concepts and clinical practice |last=Marx |first=John |name-list-style=vanc |year=2006 |publisher=Mosby/Elsevier |isbn=978-0-323-02845-5 |page=2239 |url=https://archive.org/details/rosensemergencym0002unse |url-access=registration }}</ref>!!Temperature
|-
|Stage 1
|Awake and shivering
| Mild
| {{convert|32|-|35|C|F|1}}
|-
|Stage 2
|Drowsy and not shivering
| Moderate
| {{convert|28|-|32|C|F|1}}
|-
|Stage 3
|[[Unconsciousness|Unconscious]], not shivering
| Severe
| {{convert|20|-|28|C|F|1}}
|-
|Stage 4
|No [[vital signs]]
| Profound
| <{{convert|20|C|F|1}} 
|}

Hypothermia is often defined as any body temperature below {{convert|35.0|C|F}}. With this method it is divided into degrees of severity based on the [[core temperature]].<ref name="Rosen 2006"/>

Another classification system, the Swiss staging system, divides hypothermia based on the presenting symptoms which is preferred when it is not possible to determine an accurate core temperature.<ref name="NEJM 2012" />

Other cold-related injuries that can be present either alone or in combination with hypothermia include:

*[[Chilblains]]: condition caused by repeated exposure of skin to temperatures just above freezing. The cold causes damage to small blood vessels in the skin. This damage is permanent and the redness and itching will return with additional exposure. The redness and itching typically occurs on cheeks, ears, fingers, and toes.<ref>{{Cite web|url=https://www.cdc.gov/niosh/topics/coldstress/coldrelatedillnesses.html|title=CDC - NIOSH Workplace Safety and Health Topic - Cold Stress - Cold Related Illnesses|date=2018-06-06|website=www.cdc.gov|language=en-us|access-date=2018-08-01}}</ref>
*[[Frostbite]]: the freezing and destruction of tissue,<ref name="CDC 10">{{cite web|url=https://www.cdc.gov/niosh/topics/coldstress/|title=Cold Stress|work=Center for Disease Control and Prevention|archive-url=https://web.archive.org/web/20120811011653/http://www.cdc.gov/niosh/topics/coldstress/|archive-date=2012-08-11|url-status=live}}</ref> which happens below the freezing point of water
*[[Frostnip]]: a superficial cooling of tissues without cellular destruction<ref>Marx 2010 p.1862</ref>
*[[Trench foot]] or immersion foot: a condition caused by repetitive exposure to water at non-freezing temperatures<ref name="CDC 10"/>

The [[normal human body temperature]] is often stated as {{convert|36.5|–|37.5|C|F}}.<ref>{{cite journal |vauthors=Karakitsos D, Karabinis A | title=Hypothermia therapy after traumatic brain injury in children | journal=The New England Journal of Medicine | volume=359 | issue=11 | pages=1179–80 | date=September 2008 | pmid=18788094 | doi=10.1056/NEJMc081418 }}</ref> Hyperthermia and [[fever]]s are defined as a temperature of greater than {{convert|37.5-38.3|C|F}}.<ref name=CC09/>