History BodyHorror / AnimeAndManga

** Accelerator does this when he's feeling particularly vengeful. His preferred method of messily ending someone's life? Stick a finger into a wound, and reverse the vectors of their blood flow, causing all the blood in a person's body to ''rip itself out of their skin''.

* ''Anime/MazingerZ'': Several of them: [[{{Mook}} The Iron Masks and the Iron Cross]] are corpses turned into cyborgs, and if you remove their helmets, you can see their brains, with tubes and circuits sticking into and out of the brain matter; Baron Ashura is a half-male, half-female cyborg, since Big Bad Dr. Hell stuck together two halves of two different mummified corpses -and he is a shape-shifter, too; Viscount Pygman has another person sticking out of his neck instead of a head...

*** Pearl Jam is a Stand that hides in food. When somebody eats said food, one disease or injury they had is healed in an incredibly unpleasant way, the prime example being when it cures Okuyasu's diarrhea by making his intestines burst out of his stomach. On the bright side, once the horror ends the eater is completely safe and healthy.

** There's also the short story ''Hell'O Dollies'', also called ''A Doll's Hellish Burial''. It starts out with telling that the world has been struck by a disease that kills children by mutating their bodies so they look like porcelain dolls. That is horrifying enough, especially if one is [[CreepyDoll not too fond of dolls]]. But then it is revealed that a [[FromBadToWorse much more horrifying and unexplainable body horror of the dead doll children happens if they are not buried]]...

** The manga ''Getter Robo Go'' has [[spoiler:Shin Getter Robo absorbing it's pilots, the BigBad, the BigBad's fortress, and a good chunk of the north pole to become a moon sized robot before flying off to Mars. The last page of the manga shows a fossilized Shin Getter with Go's face sticking out the side. Later stories reveal that Shin Getter eventually absorbs Mars, becoming the Getter Emperor, out grows our galaxy, and defeats what is alluded to be God.]]

* ''Anime/HellGirl''. In season 3, ''The Cauldron of Three'', Enma Ai has no body. So what does she do whenever she needs one? She ''grows it'' out of a giant cocoon that emerges from the ''back'' of Mikage, her DemonicPossession victim. Poor Mikage screams every time.

* Everything by manga artist Creator/JunjiIto (well, ''[[Manga/JunjiItosCatDiaryYonAndMu almost]]'' everything):
** He is especially well-known for ''Manga/{{Uzumaki}}'', a three-volume manga about a town that is "infested by the spiral," which manifests itself in various horrific ways. You will never look at a cinnamon roll the same way again.
** ''Manga/TheEnigmaOfAmigaraFault'' has people finding holes in a fault that are shaped just like them. People enter their holes, which warp and distort as the passages go on... and the people in the holes are warped in the shape of their holes. And are implied to '''''still be alive despite their nauseating new shape''''' by the time they reach the other side.
** ''Manga/{{Gyo}}'' might be a better example, since in ''Gyo'', the characters themselves remain conscious enough to realize what is happening to them, swelling up ghoulishly, spewing out toxic gases to spread the condition, and hooked up to spider-like machines.
** There's also the short story ''Hell'O Dollies'', also called ''A Doll's Hellish Burial''. It starts out with telling that the world has been struck by a disease that kills children by mutating their bodies so they look like porcelain dolls. That is horrifying enough, especially if one is [[CreepyDoll not too fond of dolls]]. But then it is revealed that a [[FromBadToWorse much more horrifying and unexplainable body horror of the dead doll children happens if they are not buried]]...
** Likewise, his manga ''Manga/{{Tomie}}'' is about a girl who can regenerate FromASingleCell. This regularly results in things like her growing extra heads from her wounds, or her severed limbs regrowing bodies of their own.
** ''Manga/DissolvingClassroom'' is packed to the gills with people's brains melting and running out of their noses and eyes, people completely liquefying, and one chapter features girls whose faces become horrifyingly distorted.

* In ''Manga/DemonSlayerKimetsuNoYaiba'', for his bout against one of the spider family demons, Zenitsu gets inflicted with a demonic art meant to mutate his body into a demonic spider creature, Zenitsu’s arm begins to mutate but in desperation he finds strength to defeat the demon, he then gets rescued and put under intense care to heal his arm which by then had shrunk, starting to mutate into spider claws, in the aftermath however Zenitsu is fully healed.

* ''[[Anime/MobileFighterGGundam G Gundam]]'' has the DG Cells, which completely corrupt your body ''and'' your mecha and have a disturbing level of control over your whole self. Almost every single person contaminated with them ends up dying messily. [[spoiler:Only Allenby, the Shuffle Alliance and Saette survive. And in the case of the Shuffles, it took an HeroicSacrifice to de-brainwash them]].
** Assimilation by the ELS in ''Anime/Gundam00AwakeningOfTheTrailblazer''. Consists of your body turning into metal from the inside out, with metallic crystals growing ''out through your skin'' as it happens. Everyone it happens to is screaming in pain as they die. Worse, some ELS didn't have enough raw material to fully convert a human, leaving at least one girl only halfway assimilated: half her body human, half metallic spikes. [[spoiler:Once the ELS have a better understanding of humans, they refine the process so that it is both nonlethal and voluntary: said girl is shown in the epilogue to still have a half-ELS body, but now shaped fully human and living a normal life.]]

* In ''Anime/PrincessMononoke'' the two boar spirits Nago and Okkoto end up like this, and it would apparently have been the eventual fate of Ashitaka as well.

* Crops up a whole lot in ''Manga/SazanEyes'', maybe most horrifyingly when it comes to the Hyouma Tribe and pregnancy...

* Vash's Angel Arms transformation from ''Manga/{{Trigun}}'' were horrifying the first time, if for nothing else because he has no control. Vash is screaming his head off in a combination of terror and panicked memory, just trying desperately to get the thing pointed skyward so that he won't do any more damage to the city. It doesn't work.
** More specifically: what begins with his revolver spinning a small cylinder of white matter continues with said cylinder apparently morphing with the revolver ''and the arm'', and finishes with his arm ''splitting down the middle'' with a glowy Orb of Death thingy suspended in it. Then again, Knives appears to do it casually, so it's conceivable that the process itself is painless - Vash only screams because he is being forced to do it to hurt/kill people against his will.

* ''Manga/{{Unico}} in the Island of Magic'', had a puppet-master villain with bug eyes and the ability to distort his shape at will, as well as plenty of terrifying transformations. The villain's castle is built out of people who have been transformed into blocks and there's a creepy dream sequence where Unico and his friends are turned into dolls.

* ''Kite Liberator'', the sequel to the infamous ''Anime/{{Kite}}'', has [[spoiler:the main character's astronaut dad transforming into a twelve-foot monster made of solid bone]].

* Manga artists such as Jun Hayami, Shintaro Kago, Junji Ito, Suehiro Maruo, and Benko Tamaoki frequently depict body horror in their stories.

** One early magic user turns people into bugs incompletely, so the victims have withered, outside insect limbs on human bodies

* In ''LightNovel/ACertainMagicalIndex'', one of the members of GREMLIN, Marian Slingeneyer, is able to reshape anyone who comes into contact with her gold tools into whatever shape she wants and [[AndIMustScream keep them alive]]. Anyone who crosses her risks either a CruelAndUnusualDeath or becoming the latest addition to her furniture collection.

* ''Manga/{{Devilman}}'': Any creature you can find in this series counts, including the main character. Amorphous slimes fulls with eyes, fangs and tentacles and oozing vile fluids are the less nightmarish thing you will find.

* In ''LightNovel/FateZero'' this happens to pretty much all of Ryuunosuke's victims and the children Caster uses as weapons. This is made even worse when they team up, as Caster ensures the victims will survive things they really, really shouldn't, letting Ryuunosuke get even more... creative.

* ''LightNovel/ShakuganNoShana'': Yuuji finds out, that he [[spoiler:has the silver Tomogara, a giant knight, within him... By having it ''slowly'' crawl out of his body, while he's hovering in mid-air.]] The process is eventually stopped and reverted, but he suffers a HeroicBSOD after it.

** ''Anime/DigimonGhostGame'' has a ''hard-on'' for these. There are many Digimon capable of causing horrible mutations on the bodies of people, including a Calamaramon who can twist the body parts of living beings into spirals through sound waves, an Eyesmon who outright grows red eyes on top of other people's bodies by possessing them and Chamblemon that can grow mushrooms on people's bodies. It's not just random passerby who get hit, either; even the protagonists can be routinely hit with a horrific transformation and there's no holding back trying to greivously harm them.

* In ''Anime/DigimonAdventure'' the villianous Myotismon proves to be NotQuiteDead, and to complete his resurrection, his bats devoured his minions for their data and formed a new body for him, a massive and creepy-looking demon. Worse still, when the heroes use their strongest attacks against him they release what he calls his true form: a small, impish creature that emerges ''from his crotch''.
** The latter is in reference to some depictions of {{Satan}}.
** Then there's [=SkullGreymon=], who, according to its official bio, focused so hard on fighting that it fought until its flesh wore away and it was nothing but bones. Imagine what it looked like mid-transformation. Yikes.
** And the Rookie-to-Champion digivolution sequences in ''[[Anime/DigimonTamers Tamers]]'', which all involve the Digimon's skin peeling off, their wireframe morphing into that of their new, more powerful form, and then their skin coming back and reattaching itself.

** Titans employ this through their [[UncannyValley deformed]], [[BarbieDollAnatomy sexless]] naked bodies that vary in size from 3 meters to 15 meters. Their bodies are fragile, but their HealingFactor means very little can kill them and allows for nightmarish imagery as humanity tries to kill them with swords, guns, explosives, cannonballs, and spears.

** [[Anime/FullmetalAlchemist The first anime]] adds in [[spoiler:Tucker accidentally turning himself himself a freakish humanoid chimera in an attempt to revive Nina]] and the return of Gluttony in the movie.

* ''VisualNovel/HigurashiWhenTheyCry'': [[spoiler:Despite being imaginary, Rena's maggots. And the squishy sounds they were making...]]

* Naraku from ''Manga/InuYasha''. He's a half-demon created by a swarm of demons merging with a single human soul. As a result, during his "night of humanity", he reverts back into a swarm of demons clustered around his human components. By the first time we see this, he has been heavily damaged by a holy arrow and forced to assimilate '''more''' demons into his body to replace the lost ones. Couple this with his experiments in fusing, separating and refusing demons in order to find a way to increase the powers of his specimens, a process that he has been refining for use on himself in order to someday expel the fragment of him that's human, and the result... his "night of humanity" sees him as a severed head attached by slimy... ''strings''... of sinew and flesh to a massive pile of random pulsating, twitching, demonic bodyparts. In the early seasons of the anime, once he's actually confronted in the flesh, a favored form sees him as a human upper torso with myriad withered limbs sprouting from his back and a writhing cluster of misshapen tentacles and tails replacing his lower body. His "puppets" also display elements of this, in that they physically attack by taking the form of giant knots of tentacles protruding from the ragged remnants of a white baboon skin..

* {{Manga/Infection}} by ''Oikawa Tooru'', sets its bar in its ZombieApocalypse with the "[[OurZombiesAreDifferent Carriers]]", who have their eyes ''[[EyeScream replaced with squirming worms]]'' in addition to being utterly stuffed with the things...and then the BodyHorror bar gets only '''[[FromBadToWorse higher]]''' from there.