# Body temperature

<mark style="color:$danger;">**This Editorial Guide is used for Education Purposes Only. It is used in the Authoring Courses and Certifications. It is based on the January 2026 Editorial Guide.**</mark>

*Core body temperature* is the temperature in the deep tissues and internal organs, including the brain. The gold standard site for measuring core body temperature is the pulmonary artery. Other sites for measuring core body temperature include the nasopharynx, esophagus, bladder, gastrointestinal tract, and vagina. Some peripheral sites are commonly used to estimate core body temperature but are not a true representation of core body temperature on their own, e.g., axillary region, inguinal region, sublingual space. *Body surface temperature* is measured at several sites, e.g., skin, foot, spine.

For example,

* 698831002 |Core body temperature measured in nasopharynx (observable entity)|
  * 415882003 |Estimated core body temperature measured in axillary region (observable entity)|
  * 364518005 |Temperature of foot (observable entity)|

<a href="https://docs.google.com/forms/d/e/1FAIpQLScTmbZIf0UEQwYDkY27EEWBkaiYkHSbR0_9DmFrMLXoQLyL7Q/viewform?usp=pp_url&#x26;entry.1767247133=SCT+Editorial+Guide&#x26;entry.670899847=Body%20temperature" class="button primary">Provide Feedback</a>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.snomed.org/education/snomed-ct-education-editorial-guide/readme/authoring/domain-specific-modeling/observable-entity/observable-entity-modeling/body-temperature.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.