An entire episode as told from the perspective of someone who is very sick, their hallucinations and fever dreams [[BizarroEpisode giving everything a very warped slant]]. {{Nightmare Sequence}}s are to be expected, whether the character is awake or not. The viewer may feel late to the party if the episode starts in the middle of such dreams without explanation, leaving the viewer to gradually piece together what's ''really'' going on.

Does not count as a Fever Dream Episode if other, ''lucid'' characters are watching the sick one stumbling around.

Subtrope of SickEpisode. See also MushroomSamba. May be an instance of BadDreams or DreamingOfThingsToCome. Compare YourWorstNightmare and TalkingInYourDreams, both of which may be mistaken for this.

See also AdventuresInComaland, when a long-unconscious character goes on a spiritual journey inside their own head.

Not to be confused with a brief glimpse of the world as seen through the eyes of someone who's just [[TapOnTheHead taken a blow]], had a whiff of poison gas, etc. and is about to go down for the count -- that's ImpairmentShot.
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!!Examples:

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[[folder:Anime and Manga]]
* Yuno's day with a fever in ''Manga/HidamariSketch''. Most of the episode is spent in dream, but there are still scenes in the "real world" from time to time. Oddly, some of Yuno's dreams turn out to be remarkably accurate to what happens at school that day. The episode also contains a [[CrowningMomentOfHeartwarming very sweet scene, when Miyako decides to help out Yuno]].
* Happens in ''Anime/SuperDimensionFortressMacross''. It was actually a ClipShow with clever editing and a new soundtrack, appearing as a dream after Hikaru was shot down by accidental friendly fire.
* A very fun episode if Shin-Chan is basically a very long fever dream which constantly references heat.
* Yurie's fever in ''Anime/{{Kamichu}}'' had the strange effect of casting her out of her body. Being new to Goddess-hood, she wasn't sure what was real and what was dream. Ironically, Kenji actually noticed her for once.
* A common [[WildMassGuessing fan theory]] about the ''Anime/CowboyBebop'' episode "Toys in the Attic" (the one with the BlobMonster) is that it's actually [[AllJustADream just a weird dream]] Spike has while he's sick with food poisoning.
* An early episode of ''Anime/WindyTales'' features this as Nao lays in the nurse's office and incorporates the conversations of those who come and go into her dreams.
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[[folder:Literature]]
* In Creator/PiersAnthony's ''Mode Series'', the main character is infected by a psychic virus that makes her go into vivid dreams to destroy her already precarious sense of self-worth. Whenever she thought of anybody, she would immediately go into an indistinguishable dream where the person hated her and would attempt to kill or torture her, with each dream being worse and more savage than the last. She ultimately beats it by thinking of herself and tackling her self-doubts head on.
* Creator/RayBradbury's short story "Fever Dream" combines this with BodyHorror and CassandraTruth (oh, God, that poor kid...).
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[[folder:Live-Action TV]]
* ''Series/{{House}}''! The episode where he gets shot, and the patient's balls explode.
* The ''Series/NewsRadio'' episode "Daydreams", where everyone has heat-induced hallucinations while they wait for the AC to be fixed.
* "[[Recap/TheTwilightZoneS3E75TheMidnightSun The Midnight Sun]]" episode of ''Series/TheTwilightZone'', classic edition, is like this. The world has slipped from orbit and is falling toward the sun. Consequently, everyone's quite literally being slowly cooked to death. TwistEnding goes: [[spoiler: it was a fever dream because the dreamer was feverish from being sick. The world has actually slipped from orbit and is falling away from the sun, so everyone is slowly freezing to death.]]
* ''Series/StargateSG1'' episode "The Changeling" combines it with CuckooNest.
* An episode of ''Series/{{Dinosaurs}}'' had Baby Dinosaur sick and hallucinating that the tender words of comfort and support his family were saying to him were evil threats to devour his feet.
* A ''possible'' case is the ''Series/RedDwarf'' episode "Confidence and Paranoia", where a mutant disease makes Lister have solid hallucinations that everybody can see and interact with (the Cat was able to eat the hallucination fishes).
* The musical episode of ''Series/{{Scrubs}}''. A woman ends up in the hospital because she imagines that everyone around her is singing.
* In the ''Series/{{Bones}}'' season 4 finale, "The End In the Beginning", Booth is in a coma after undergoing brain surgery and has a dream where he and Bones run a nightclub called The Lab, staffed by the regular cast, and they're the ones being investigated in relation to a murder. He wakes up once the murder is solved. Also, [[ShipTease he and Bones are married in his dream.]]
* The ''Series/{{MASH}}'' episode "Follies of the Living - Concerns of the Dead" combines this trope with NearDeathClairvoyance: Klinger sees, and talks with, the ghost of a recently-dead soldier while recovering from a high fever.
* ''Series/PowerRangersDinoThunder.'' A comatose Tommy has to fight for his life against ''his past Ranger forms.''
* The [[http://memory-alpha.org/wiki/Amok_Time#Other_information German dub]] of ''Series/StarTrekTheOriginalSeries'' changes the episode "Amok Time" into this, in an attempt to remove the references to sexuality. In this version, Spock is ill with "Space fever", and the fight between him and Kirk is a hallucination.
* ''Series/TheGeorgeLopezShow'' had two episode in which George drinks tequila with the worm and hallucinates about alternate realities, the first being a WhatIf scenario where Benny was nicer to him growing up, the second depicting him and Ernie as a gay couple.
* ''Series/TheKingOfQueens'' had an episode where Doug dreams he is in ''Series/TheHoneymooners''.
* Elements of this appear in the ''Series/{{Farscape}}'' episode "Won't Get Fooled Again", but both John and the audience think it's [[MagnificentBastard Scorpius]] messing with him again. In actuality, it's a different alien inducing a fever dream in an effort to extract information.
* Series/{{Angel}} spends an entire episode stuck in a fever dream thanks to a demonic parasite.
* The ''Series/EvenStevens'' episode "Influenza: The Musical" is Ren's fever dream. As you probably guessed from the title, this was also the MusicalEpisode.
* ''Series/TheSopranos'' episode "Funhouse" contains multiple fever dreams after Tony gets a bad case of food poisoning. In one of them, Tony douses himself with gasoline and lights himself on fire.
* ''MajorDad'''s Halloween special featured this. In it, Casey is excited about going trick-or-treating. She gets a cold and falls asleep and has a fever dream, where she imagines that every main character is a horror movie monster.
* ''Series/{{Life On Mars|2006}}'' is made of this trope, but the most significant and direct example is [=S02E05=], where 2006!Sam's [[spoiler:medication has been messed about with and 1973 seems to warp out of control; instead of being realistic, billboards remind him of his thoughts, lollipop ladies' signs read OH SHIT! and other things happen to him which show his stability in a coma is taking a dramatic turn for the worse. At one point during the episode he is actually sedated so deeply he can only watch his comrades on a television screen as they attempt to solve the crime of the week]].
** And of course the US version was entirely a variant of this trope-the whole thing was Sam's dream, though a cryo-sleep one rather than a fever one.
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[[folder:Videogames]]
* The entire plot of ''VideoGame/{{Hitman}} Contracts'' is one long examole. 47 is mortally wounded and hiding out in Paris. As he slips in and out of consciousness, he relives previous missions which the [[PensieveFlashback player experiences]].
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[[folder:Webcomics]]
* In the ''Webcomic/PennyAndAggie'' arc "The Lady and the Tiger" Aggie, due to an allergic reaction to medication, has one of these, doubling as a [[CharacterDevelopment character-building]] [[spoiler: NearDeathExperience]].
* In ''Webcomic/{{Homestuck}}'', after [[spoiler: Jade's dream self dies]], she ends up on the receiving end of this and the viewers get to see. Karkat and Feferi meanwhile [[spoiler: got killed while dreaming]] and end up getting the same results, though [[ConditionedToAcceptHorror Feferi knew this all along]] and is more than happy to explain the situation to her.
* The second arc of ''[[http://marryme.keenspot.com/ Marry Me]]'' is about ([[ExactlyWhatItSaysOnTheTin and entitled]]) when Parker met Guy. Parker, doing a babysitting job, is told by her temporary charges that their uncle Guy is upstairs, sicker than an entire pack of effluent dogs. Guy is clearly having a good time with this, because although he's fully awake, he's nowhere near lucid; when he inevitably manages to escape Parker's attention with the boys, he comes to the conclusion that they need hamburgers, and treats their fast food order with all the grave urgency of a black ops mission.
* ''Webcomic/FullFrontalNerdity''
** Happens in a sequence starting [[http://nodwick.humor.gamespy.com/ffn/index.php?date=2010-01-13 here]].
** Subverted in a future plot arc; while Lewis is treated to one of these after eating Mexican takeout, he flatly refuses to go along with it and tells the pixie-like Aesop-deliverer to go screw.
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[[folder:Western Animation]]
* An episode of ''WesternAnimation/{{Rugrats}}'' has Tommy get sick, leading to a sequence like this.
* The {{animesque}} ''WesternAnimation/HiHiPuffyAmiYumi'' has this happen to the main characters, induced by cheap sushi.
* The ''WesternAnimation/{{Futurama}}'' episode "[[spoiler: The Sting]]" is a notable one of these, mixed with a ''healthy'' dose of MindScrew.
* ''WesternAnimation/DuckTales'': A fever causes Scrooge to have a bizarre fantasy of himself as a {{Gender Flip}}ped Literature/{{Cinderella}} with Goldie as his RebelliousPrincess. Hey, [[RuleThirtyFour to each his own]].
* The ''WesternAnimation/AvatarTheLastAirbender'' episode "The Earth King" has this for Zuko's side of the story, when he [[AngstComa gets sick as a result of doing the right thing.]]
* One episode of ''WesternAnimation/FostersHomeForImaginaryFriends'' begins with Bloo as his SuperpoweredAlterEgo the Bloo Superdude battling his way through a ''DungeonsAndDragons''-type world. Gradually it is revealed that it's just a feverish Bloo wandering around the house and attacking his friends.
* The ''WesternAnimation/ScoobyDooMysteryIncorporated'' episode "Mystery Solvers Club State Finals" has Scooby too sick to take part in the titular contest and has a dream where he and the gang are there. The dream has everyone [[ArtShift look more like their original Hanna-Barbera designs]].
* ''WesternAnimation/BatmanTheBraveAndTheBold'': "Shadow of the Bat!" opens with Batman and Jason Blood fighting the pseudo-vampire Dala and Batman getting bitten. The rest of episode involves Batman turning into a vampire and attacking the Justice League, before Batman and the vampiric Leaguers are destroyed by Martian Manhunter and Jason Blood. The end reveals that Batman collapsed immediately after being bitten, and becoming a vampire was just a hallucination brought on by Dala's toxins in his blood.
* The [[WesternAnimation/GarfieldAndFriends U.S. Acres]] episode [[WhereNoParodyHasGoneBefore "Swine Trek"]].
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