[[quoteright:186:[[Webcomic/{{Roza}} http://static.tvtropes.org/pmwiki/pub/images/Clipboard02_8638.png]]]]

Let's face it, [[MsFanservice some]] [[MrFanservice characters]] [[TheBeautifulElite are pretty damn hot]]. Other characters may have [[HotBlooded raging hot passion]]. But in this trope's case, we find fictional creatures that are ''{{literal|Metaphor}}ly'' HotBlooded (or anything that's [[AlienBlood close enough to blood]]).

This type of being usually has an implication (or at least a possibility) of a temperature difference that's caused by metabolism-based weirdness. This makes some sense, as there are several organisms in RealLife that have an average body temperature that's higher than the human average.

Characters that can [[PlayingWithFire play with fire]] tend to exhibit this trope, along with many fire-related monsters like dragons, salamanders, and fire-related {{familiar}}s. Lava Beasts, fire elementals, and other creatures that actually made of some heat related substance [[ElementalEmbodiment are another trope altogether]].

They may be WreathedInFlames, or have FlamingHair as well. Contrast ChillOfUndeath.

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!!Examples:

[[AC:{{Anime}} and {{Manga}}]]
* Shishio, the season 1 big bad of ''RurouniKenshin''. He was shot in the head and lit on fire before being left for dead. The fire left him disfigured, and all of his sweat glands were destroyed. As such, he has incredibly high body temperature, which (apparently) grants him almost superhuman speed and strength. The downside is that he can only fight for a few minutes before the heat buildup kills him.
* The [[UltimateLifeform Pillar Men]] from ''Manga/JoJosBizarreAdventure'' have each mastered a type of fighting style called "Mode", where they [[BodyHorror freely transfigure their own bodies]] to emulate ElementalPowers. Esidisi's Mode is flame, which entails heating his blood to 500 degrees Celsius then extending his blood vessels from his body and injecting his blood into an opponent. The results are just as [[BodyHorror horrifying]] as they should be.

[[AC:ComicBooks]]
* In ''ComicBook/PS238'', Suzi has an internal body temperature which can melt lead, which appears to stem from her radioactive nature. Incidents where she loses her temper are explained as "gas leaks".

[[AC:{{Film}}]]
* What happens when you piss off someone upgraded with Extremis in ''Film/IronMan3''. (Volcanic Ghost Chili level)
* The Assblasters from ''{{Tremors}} The Series''. As their name indicate, they fart fire to fly in a rocket-like manner.

[[AC:{{Literature}}]]
* Werewolves in ''Literature/{{Twilight}}''. (Perhaps that's why they [[WalkingShirtlessScene so rarely wear shirts]].)
* The [[OurElvesAreBetter Marat]] in ''Literature/CodexAlera'' are slightly warmer than humans. This is important in the first book, when one is trying to sneak into a forest guarded by creatures who see in infrared.
* [[BigBad Sauron]] himself in ''Literature/TheLordOfTheRings.'' The reason why his ring was glowing on his hand was because he was inhumanly hot.
* Invoked in ''TheSookieStackhouseMysteries'' (books that were the basis for TrueBlood); werewolves and other shifters are mentioned several times time as "running hotter" than their human counterparts.
* The "[[OurVampiresAreDifferent vampires]]" of ''Literature/IAmLegend'' are humans with a disease that ([[ZombieApocalypse among other things]]) sends the body into overdrive. They run a fever of about 103 Fahrenheit as a baseline.
* Dragons of ''Literature/ASongOfIceAndFire'' do this. In fact, wound them and leave the weapon behind, and it may start to glow with the heat depending on how high quality the iron or steel is. Bronze and copper are likely to fare worse and could well start to turn molten if left too long (and goodness knows if they can give the poor dragon blood poisoning or not). Good luck trying to play vet, though.
* Simes in Literature/SimeGen have a body temperature noticeably higher then that of Gens and children. This incidentally means they don't get sick as often as many germs can't tolerate the higher temperature.

[[AC:LiveActionTV]]
* ''TrueBlood'' has its [[OurWerewolvesAreDifferent Werewolves]].
-->'''Alcide:''' We run hot.
* In ''Series/{{Farscape}}'', Scarrans are extremely hot, and can project this heat as a weapon. Compare with Sebacceans, who are colder than humans and vulnerable to hot temperatures. Scorpius, being a hybrid of both races, needs cooling rods implanted in his head to survive.
** Technically Scorpius can survive without coolant, but will always be weak.
* In the ''Series/{{Supernatural}}'' Season 4 finale, Sam Winchester was said to have reached body temperature of 150F (65C) when he was killing Lilith, courtesy of the demon blood he was using.

[[AC:TabletopGames]]
* ''TabletopGame/DungeonsAndDragons''
** Remorhaz - hot enough that nonmagical metal weapons melt on contact and if it swallows you it's game over, instant death, no save, do not pass go, do not collect Ł200.
* ''TabletopGame/{{Warhammer 40000}}'' has the [[PhysicalGod Avatar of Khaine]], which has molten iron running through it's veins. It's also WreathedInFlames.
* ''TabletopGame/PsionicsTheNextStageInHumanEvolution'' features a somewhat realistic example of how this would play out in real life. The pyrokinetic ability Temper, Temper, Temperature can be used to raise the body temperature of living things. Raise it enough and they'll die from boiling in their own skin.

[[AC:VideoGames]]
* Many Fire-typed Franchise/{{Pokemon}} are described as having a flame-producing sac or other such organs in their bodies. Some Pokémon like Magcargo and Heatran literally have magma for blood.
* The AxCrazy bioweapon Alexia Ashford from ''VideoGame/ResidentEvilCodeVeronica'''s main method of attack is slinging her blood at her foes, which combusts on contact with the air. [[spoiler:Another host of T-Veronica, Manuela Hidalgo shows these same powers, though she's not nearly as evil as Alexia. It can be assumed that the fire-based attacks of her father Javier's V-Complex form run on the same principal as well, as they spring from Veronica too.]]

[[AC:WebComics]]
* ''Webcomic/{{Roza}}'': The heroine's blood combusts when spilled.
* The salamander demons from HeartCore (Carval and Volaster Jarvoc) has explosive blood wich they use in order to make bombs.

[[AC:WesternAnimation]]
* An episode of WesternAnimation/DarkwingDuck had an ''inversion'' as a villain: Isis ("Icy") Vanderchill, who had ''frozen'' blood from a FountainOfYouth experiment gone wrong.

[[AC:RealLife]]
* The whiptail lizard has an average body temperature at 106 Fahrenheit (Roughly 41,11 Celsius).
* The hotheaded naked ice borer, a cryptozoological animal invented for an [[http://www.museumofhoaxes.com/hoax/Hoaxipedia/Hotheaded_Naked_Ice_Borer/ April Fool's hoax]].
* Canines in real life have normal body temperatures that are slightly higher than a human's, which may or may not have anything to do with werewolves usually having high body temperatures too.
** This is mostly true for most small warm-blooded animals. Mostly due to the SquareCubeLaw.
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