[[NagasareteAirantou http://tvtropes.org/pmwiki/pub/images/cit_Nagasarete_Airantou_-_lack_of_modesty_can_be_a_beautiful_thing_sometimes.jpg]]
Healthy young men that have no other sexual outlet will often suffer nosebleeds upon seeing the naked female body, or even just a pair of well-filled panties. It's probably a side effect of HighPressureBlood in a body that's OverdrawnAtTheBloodBank.

In recent anime and manga, female characters are increasingly becoming subject to nosebleeds. This typically happens to characters with strong... appetites and SchoolgirlLesbians in particular. {{Yaoi Fangirl}}s are also likely to show this effect. The more benign, traditionally feminine version of this is LuminescentBlush. Female characters may also get nosebleeds upon seeing something they think is [[{{Moe}} absolutely adorable]], although males have lately become increasingly vulnerable to that as well.

This happens in virtually every anime with {{Fanservice}}.

Note: In Japanese anime and manga, the nosebleed is a visual shorthand/euphemism for sexual arousal, specifically an erection in males (which makes it all the more odd when used with a female character.) When blood shoots from the nose explosively, and in ridiculous quantity, [[UnusualEuphemism the implication is an actual ejaculation.]] In female characters, the implications are something NOT to think about... well, okay, [[{{Rule36}} some of us may like to think about it, but...]] [[SoYeah yeah]].

The concept comes from a Japanese old wives' tale.

Frequently results from a PantyShot. May also occur from a MegatonPunch to the face. Contrast with PsychicNosebleed. Compare VisualInnuendo and SomethingElseAlsoRises.

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!!Examples:

[[foldercontrol]]

[[folder:Anime and Manga]]
* Ryōga in ''[=~Ranma ½~=]''. Even when he's P-chan the pig. This often confused Akane. Why should MarshmallowHell arouse a pig?
** Notably, he's immune to Ranma's naked female body (except in one or two {{Filler}} anime episodes, whereas he normally may get a little flustered at most), because he considers [[TheRival his rival]] to be nothing if not 100% male. ''Any other'' naked woman will have this effect, regardless of his feelings for her.
* Tenchi in the HotSpringsEpisode of ''[[TenchiMuyo Tenchi Muyo! Ryo-Ohki]]''.
* ''{{Naruto}}'': Whenever Naruto uses his Sexy Jutsu in front of one of his (male) elders, they almost always have a massive nosebleed that knocks them off their feet. The blood however is completely edited out in the English TV broadcast version, although it is still intact on DVD.
** It also happens to him when Sakura knocks him out with a MegatonPunch.
** Sakura, of all people, gets a nosebleed upon seeing Konohamaru's Oiroke no Jutsu: Otoko no Ko Doushi (Sexy Technique: Guy Companions). Someone really likes the YaoiGuys.
*** This troper felt very annoyed when he found out that this scene was cut from the anime. Looks like topless girls cuddling, while barely covered by censor steam is okay for mainstream airing, but Yaoi guys are still considered a taboo.
* ''{{Mai-HIME}}'': When he spies Kuga Natsuki without panties (due to the efforts of a PantyThief), a member of the Fuuka Academy kendo team actually passes out because a of veritable pair of blood fountains that erupt from his nose.
* In ''PlasticLittle'', a character suffers an explosive nose bleed while scuba diving in a tank full of predatory fish. Nothing really comes of it.
* In the ''{{FLCL}}'' episode "Full Swing", a room full of ''female'' government agents all get nosebleeds after observing a rather suggestive dialogue between Haruko and Naota.
** "Impressive!"
* A rare female example (and even rarer heterosexual female example): Minako in ''SailorMoon'' has a nosebleed after imagining taking a bath with one of the members of the band "The Three Lights". And in the ''Sailor V'' manga she has a explosive nosebleed (and faints) after being kissed on the lips by a {{bishounen}} villain she has the hots for. Also in the ''Sailor V'' manga, regular male nosebleeds are seen several times.
** In one of the ''Sailor Moon'' manga side stories, several characters (including Mamoru) have these induced by two half-dressed female elementary school students. [[{{Lolicon}} Perverts...]]
* Another heterosexual female example has Rena Ryuugu in ''HigurashiNoNakuKoroNi Rei'' having a nosebleed after she imagines ripping off Keiichi's swimsuit and exposing his [[UnusualEuphemism furry seal]]. [[spoiler:Although she doesn't have another nosebleed after she actually ''sees'' it, [[LuminescentBlush blushing]] instead (just like the rest of the girls).]]
** Keiichi has had a nosebleed in Hirukowashi-hen. Rena, also has had more then one nosebleed in the series.
* Ayaka, in the manga version of ''MahouSenseiNegima'', nosebleeds upon seeing Negi in a compromising position. This is [[LampshadeHanging lampshaded]] once by Kotaro: "You some kind of pervert?"
** She also gets an especially explosive nosebleed when she sees Negi [[InstantCosplaySurprise dressed up]] in a [[FetishFuel fox girl costume.]] It actually [[http://www.onemanga.com/Mahou_Sensei_Negima!/90/09/ knocks her over]].
** Negi himself is apparently too young to get nosebleeds. However, he's not above a SpitTake through the nose.
** [[WeaselMascot Chamo]] gets one when Haruna [[ArtInitiatesLife creates]] [[http://www.onemanga.com/Mahou_Sensei_Negima!/175/06/ Dark Nodoka]]. Oddly, it seems to be not a result of sexual arousal, but because of the {{Squee}} that occurs when he thinks that Nodoka is getting serious with Negi.
* Kudou Yuuichi in ''{{Sensei no Ojikan}}'' has huge, fountaining nosebleeds whenever he imagines [[YaoiGuys doing naughty things with his male classmate Suetake Kenta]].
* ''DragonBall'': Master Roshi's a tendency to spew blood from the nose was actually a vital part of one battle. As Yamcha fought an opponent who was completely invisible, Krillin positioned Roshi just right at the side of the arena, then removed Bulma's top in front of him. The resulting blood spew coated the invisible man, allowing Yamcha to see him and beat him easily. Afterwards, Roshi first yelled angrily at Krillin over potentially having a heart attack before patting him on the head, saying "Good job". As this plot point was too sexual for the [[EditedForSyndication broadcast cut]] of the dub, they replaced it with [[{{Bowdlerise}} some nonsense involving tomato soup]].
* Subverted in ''{{Karin}}'': Karin does have a nosebleed whenever she is near her love interest, but for ''very'' different reasons. She is a "Blood Maker" [[OurVampiresAreDifferent vampire]], who produces more blood when she is around depressed people. The result is a literal HighPressureBlood situation, wherein it actually explodes from her veins in a spectacular fashion if she can't bite someone and inject them with the excess blood, which, incidentally, cures their depression. To down the gore factor, the blood is portrayed as ''flowers'' exploding from her nose -- at least, until it settles and we see the room soaked in blood.
** In the manga there are no flowers. Just blood. So much blood...
* Sunako from ''TheWallflower'' has such an aversion to anything she considers bright or beautiful that seeing anyone male or female she considers to be a "Bright Creature" causes her to spout torrents of blood out of her nose. The male cast members also inflict nosebleeds on almost every girl they meet.
* ''LoveHina'': Keitaro is known by his female friends for his nosebleeds, the usual result of his seeing too much female skin, to the extent that when at one point it fails to happen, Naru becomes suspicious.
* Ikuto of ''NagasareteAirantou'' (pictured above) has such explosive nosebleeds that he faints from blood loss multiple times in a single episode.
* In the manga ''FutabaKunChange'', "Bleeding Man" Chiba earned his nickname from this problem, frequently suffering from explosive nosebleeds, often caused by the main character.
* In ''FullMetalAlchemist'', Lieutenant Havoc gets a [[http://i206.photobucket.com/albums/bb161/NGR_album/222.jpg nosebleed]] after hearing Colonel Mustang's future plans to require female officers to wear miniskirts.
* Happens occasionally, and only during {{filler}} and {{omake}} in ''{{Bleach}}'' - usually to Kon, who is a plushie, with no blood... go figure.
* Shuichi from the ''{{Gravitation}}'' manga doesn't even need bare flesh: his aloof love interest promising to take him on a date if his band sells a million records or saying "Yeah" to his question if he loves him is enough to give him massive nosebleeds.
* Akira from ''Gacha Gacha Secret'' who gets many since he [[GenderBender changes into a girl when he sneezes]] and is ends up seeing his love interest (who as a girl he is friend with) naked a lot. He often passes out from the blood loss.
* Bell, the resident {{Meido}} of ''[[JungleWaItsumoHaleNochiGuu Haré+Guu]]'', is prone to massive {{Nosebleed}}s over her master, Weda. They're both female.
* In possibly the most sexually questionable scene of ''DetectiveConan'' (also known as ''Case Closed''), Conan has a nosebleed on listening to Ran relate the events of their bath together. She ignores the suggestion of this trope because he "[[JustAKid is still a child]]", not knowing who Conan really is...
** The worse or best thing (YourMileageMayVary) is that you ''can't help laughing'', since thanks to the dialogue and the absurdity of the whole situation... the scene is ''[[CrowningMomentOfFunny that]]'' hilarious.
* During the BeachEpisode of ''TengenToppaGurrenLagann'', when Nia emerges in a thin bathing suit, there's a machine-gun edit '''{{montage}}''' of nosebleeds from the male cast.
** Post TimeSkip, Kittan for [[{{Stripperiffic}} Yoko]].
* The titular character of ''SoulEater'' is very prone to this, which is a source of annoyance to both himself (it ruins his 'cool guy' persona) and his meister Maka.
* Raiel from ''TheViolinistOfHameln'' suffers from a variation of this. Instead of being triggered by anything remotely lewd, he suffers catastrophic nasal bloodloss just from standing too close to a female. Apparently, he's just that sensitive. Once as a child, a young girl told him she liked him. After being drenched in the resulting high-pressure spray, she suffered a mental breakdown and never smiled again.
*Günter in ''KyouKaraMaou'' has severe cases of nosebleeds rather frequently. Bonus points for the fact that these are caused by [[YaoiGuys Yuri, who happens to a guy as well]].
* First chapter of ''MagicalPokaan'': while casting a spell, Yuuma summons a magical wind that lifts her skirt... just enough for Dr. K-ko's aide to see her ''not wearing panties''. His nosebleed is so hard he gets sent out flying across the room... ''multiple times, only to stop after hitting K-ko in the head and knocking her out!''.
*Mayu from ''MonochromeFactor'' is a rare female example. Her severe obsession with anything bishounen causes her to have massive nosebleeds every now and then.
* Kokoa, Moka's little sister, in ''RosarioToVampire'' frequently displays nosebleeds at the sight of ''female'' fanservice.
* And another female example is Jenny from ''CosplayComplex'', who [[{{Lolicon}} gets nosebleeds around very young Athena]].
* And ''yet'' another female example is Kaneru from ''DoujinWork'', after she gets afflicted with the YaoiFanGirl bug. Maybe it's not ''that'' rare after all.
* In one episode of the ''TalesOfEternia'' anime, Keele turns bright red and falls over with blood streaming from his nose at the sight of Minima clad in only a towel.
*Happens to Morinaga in the BoysLove manga ''TheTyrantFallsInLove'' when he moves temporarily with Tatsumi who often walks around bare chested and thus causes Morinaga to nosebleed.
* Happens to Jun after his first combination in ''GenesisOfAquarion''. Interpret that however the hell you want.
* Reimi from ''BambooBlade'' gets these when she becomes enthralled by the victim of her [[StalkerWithACrush stalking habits]], Miyamiya.
* Happens to Satou once in ''WelcomeToTheNHK''. Interestingly enough, despite being linked to arousal, it's a regular, realistic nosebleed instead of an explosive fountain of blood.
* Kaname in ''S.S. Astro'' anytime she sees Izumi in the way she thinks is very cute.
* Mikan in ''{{Potemayo}}'' suffers several massive nosebleeds fantasizing about Sunao, often resulting in her being hauled off to the hospital.
*Yet another female example: Andou from ''{{Hyakko}}'' gets nosebleeds [[GirlsLove around pretty girls]]. She also checks out Ayumi's panties at one point and announced loudly that is [[BiTheWay she is bisexual.]]
* Sanji from ''OnePiece'' is often seen nose bleeding. But one particular example of this trope in the series when Brook nosebleeds, because he is just a skeleton (with an afro) that has no blood in his entity body.
** Knowing Brook, he would have infinite amusement at this fact.
* All the male officers of Bokuto Precinct in ''YoureUnderArrest'', but most notably Ken Nakajima, spring major nosebleeds the first time they meet new officer Aoi Futaba, who is beautiful, kind, highly accomplished and generally everything one might want in a woman. There's just one minor problem: [[DroppedABridgetOnHim Aoi isn't a woman...]]
--> '''Nakajima:''' All I have to say is, this whole thing shrivels the morale of the men!
--> '''Natsumi:''' Pervert.
--> '''Nakajima:''' ''No!'' All I meant to say is, this whole business is swelling out of control!
--> '''Yoriko:''' Oh, you're one to talk, Mr. Nosebleed...
* Kanako, the female protagonist of ''MariaHolic'' is extremely prone to these whenever she sees a cute girl.
**Nosebleed is also the name of the anime's OP.
* This happens in the ''OuranHighSchoolHostClub'' manga to Tamaki when he sees Haruhi in a dress. Hikaru and Kaoru notice this and call him a pervert. However, because Tamaki doesn't actually realize that he's in love with Haruhi, he thinks he just hit his nose. Honey then tries to administer "first-aid" by hitting him with a karate chop, which just makes it worse.
* Played with in ''ToAruMajutsuNoIndex''. Touma suffers a normal nosebleed in the middle of the night, and while stumbling around for a tissue accidentally wakes up the half-dressed girl sleeping nearby. Quickly realizing that this seems somewhat incriminating, Touma hastily points out that the whole nosebleed thing is an old wive's tale and that he wasn't actually ogling her. Then he gets beat up for not being attracted to her.
* ''{{Kanokon}}'' usually averts this. Despite Kouta having a girlfriend whose favorite activity is seducing him with her body and a would-be girlfriend who refuses to be outdone, he almost never nosebleeds. He passes out, runs away or gives in instead.
* ''NininGaShinobuden'' has a weird example in episode 7. The gang of ninja has a group nosebleed...in response to [[DirtyOldMan Onsokumaru]] shapeshifting to completely cover [[TokenLoli Miyabi's]] body, and generating a pair of GagBoobs.
* This happens to [[SchoolgirlLesbians schoolgirl lesbian]] Mitsu from ''HoneyCrush''. She gets bonus points because she's a ghost and shouldn't even have blood in the first place.
* Happens a lot in ''Instant Teen: Just Add Nuts''.
* In the ''RumicWorld'' short story "Excuse me for being a dog!" the protagonist (and his father) changes into a dog whenever he bleeds. Unfortunately for him, he's a boxer, and his nose is his weak spot. His father tries to train him ''not'' to bleed (or punishes him) by showing him centerfolds from nudie magazines.
* Most of Nube's male students in ''HellTeacherNube'' have high-pressure nosebleeds upon seeing their classmates (or any other woman, really) either nude or nearly there. This caused [[NobleDemon Minki]] some distress, as she first appeared to [[{{Delinquent}} Katsuya]] and [[IdiotHero Hiroshi]] in a {{Stripperiffic}} outfit... without panties. The resulting fountain coated her in blood.
** Nube himself is also prone to this. [[ChivalrousPervert In his defense]], he only reacts this way upon seeing the amazingly-endowed Ritsuko-sensei [[ClothingDamage in the nude or in lingerie]]. Seeing his [[{{Lolicon}} female students]], [[ClingyJealousGirl Yukime]], or [[InnocentFanserviceGirl Hayame]] naked only causes him embarrassment ''[[PleasePutSomeClothesOn for]]'' [[PleasePutSomeClothesOn the girls]], unless he's outright scolding them (read: [[TheTease Miki]]) for their shamelessness (read: [[GagBoobs Miki]]'s.)
* A lot of GirlsLove series have females getting this reaction because of other females. Examples include Sakuya from ''CandyBoy'', Sumika from ''SasamekiKoto'', Yuu from ''OtomeKikanGretel'', Mamiya from ''KuroganePukapukaTai'', Julia from ''StrawberryShakeSweet'', etc.
* A rather amusing example happened in ''Pastel''; the protagonist's sexy stepmother went to their school to bring him his lunch. One thing led to another and she inexplicably decided to be the class's swimming coach. This led to so many of the boys getting nosebleeds that the pool itself was stained in blood! Soon after the protagonist realized that his stepmother still hadn't left the school as evidenced by all the blood stains in the school corridors!
* Tasuke Yasuda (and his equally perverted little brother) gets these all the time in ''TenshiNaKonamaiki'', altough the blood is for some reason pink as are occasionally full body blushes.
* Hideki Motosuwa, the protagonist of ''{{Chobits}}'', has so many nosebleeds during the series while seeing Chii tumble about that one would think he'd need a transfusion.
* ''[[FullMetalPanic Full Metal Panic? Fumoffu]]''. The OnsenEpisode features [[RefugeInAudacity two particularly bloody (and hilarious) examples]]: while listening in to the girls' conversation through the dividing wall, Kazama, the more naive of the series's ThoseTwoGuys, has a full-on ''[[ImpressivePyrotechnics explosive nosebleed]]'', while the [[LovableSexManiac more experienced]] Kurz merely gushes about a quart per second from both nostrils.
* In ''ParadiseKiss'', Yukari provides a female example when introduced to [[{{bishonen}} hair stylist Seiji Kisaragi]].
* In the second (or third, if you count the special) ''KodomoNoJikan Ni Gakki'' OAV, [[SchoolgirlLesbians Kuro]] has what is probably the biggest nosebleed in anime history after Rin tells her that she's not wearing panties.
* ''{{Ichinensei ni Nacchattara}}'': Genderbent Iori gets some reassurance that his memories of his past life are genuine when he passes out from a nosebleed at seeing his crush naked.
* Ryoma gets a nosebleed the first time he sees Rouge in the PowerStone AnimatedAdaptation, despite his attempts to cover it up. [[BellyDancer But who wouldn't get one in the first place?]]
* Kakuka, a lesbian from ''[[KoihimeMusou Shin Koihime Musou]]'' gets quite an [[ExaggeratedTrope exaggerated version]] of this trope. The slightest perverted thought will create a spew of blood so large that she can actually use it as a weapon.
[[/folder]]

[[folder:Film]]
* In a rare live action example, Heishiro, the protagonist of the film ''Samurai Fiction'' (itself an AffectionateParody of the [[JidaiGeki chanbara genre]]), reacts to the sight of his love interest with a nosebleed. Twice.
* One of the [[EveryoneIsJesusInPurgatory many possible explanations]] for Henry's nosebleed in ''{{Eraserhead}}''.
[[/folder]]

[[folder:Live Action TV]]
* Rare non-anime example in ''{{Frasier}}''. Niles gets them around Daphne quite frequently.
* Another non-anime example: In an episode of ''HowIMetYourMother'', Barney agrees to teach a socially inept male co-worker how to hit on women. Barney discovers, to his dismay, that the guy in question can't even talk to attractive women without suffering a nosebleed. The two decide to try passing it off as "a military injury" -- and somehow, this actually works.
* Bottom Contest – Mentioned in passing by Eddie when having the [[ItsNotPornItsArt Art v. Pornography argument]] with Richie. [[http://www.youtube.com/watch?v=c9pfDnbhhvs&feature=PlayList&p=11FA4C3D7D57C383&index=0&playnext=1]]
--> '''Eddie:''' There's those three birds on the top of the third pillar from the left [''in The Sistine Chapel''] with the bit of blue ribbon. Gaww! Some of the things they're doing would make your nose bleed!
[[/folder]]

[[folder:Video Games]]
* Brooklyn Luckfield from ''SuperRobotWars'' is easily flustered, thus almost always in danger of getting hit with this trope. Not to mention his teammate is one flamboyant, cheery MsFanservice who wouldn't mind teasing him on his nosebleed tendencies.
* ''DeadRising'': If Frank takes a picture that the game labels as "erotica" he will have a nosebleed for a few minutes afterwards.
* Similar example: In ''EliteBeatAgents'' failing a certain section of a certain song results in the character getting her clothes destroyed. Since that character is a white blood cell, the person she inhabits sneezes in real life.
* In ''{{Persona 4}}'', [[spoiler:[[AmbiguouslyGay Kanji of all people]]]] gets one of these when he sees Chie and Yukiko in their swimsuits. When this incident is referred to later, he's teased about it [[DoesThisRemindYouOfAnything in the same way]] a real guy would be made fun of for getting a visible stiffy.
** Before even that weeaboo-fest, Miyabi ''Hana''kou''ji'' of ''Persona 2 Innocent Sin'' got her nickname, ''Hanaji'', when she had a [[AmbiguouslyGay nosebleed in the girls' locker room]]. Subverted perhaps, as it seemed to be just a wrong-place-wrong-time scenario. Though she did have the hots for a certain visual kei rocker boy (girlyman) for a while.
* In ''MetalGear Ac!d'', there are bonus 'model cards' with pictures of sexy Japanese women on them. If Teliko uses one of these cards, [[HaveIMentionedIAmHeterosexualToday they have no effect]]. If Snake uses one of these cards, he gains the BLEEDING status for ten turns.
* A lot of ''{{Touhou}}'' fanart likes to depict Ran Yakumo getting epic nosebleeds around [[strike:Chen]] ''[[SayMyName CHEEEEEEEEEEN!!]]''
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[[folder:Webcomics]]
* This trope is mentioned and refuted in the [[http://iperyys.net/ssos/fyi.html#juststuff FYI section]] of ''OtterSoldiers'', where it is subverted: one of the main characters suffers from frequent nosebleeds for perfectly genuine reasons.
* Vashiel from ''{{Misfile}}'' can't seem to stop having these after seeing Ash naked. Ash has a female example of the nosebleed [[http://www.misfile.com/?page=592 here]], complete with GhostLights, followed by a LuminescentBlush.
** [[http://www.misfile.com/index.php?page=1095 Vashiel later gets a job working under Dr. Upton.]] HilarityEnsues.
* ''[[MenageA3 Ménage à 3]]'' does this [[http://www.menagea3.net/d/20080918.html a]] [[http://www.menagea3.net/d/20090212.html lot]] out of slapstick. Not surprising when you're a straight guy with two casually sexy roommates.
* In a similar vein, Ron from the comic strip ''Electronic Tigers'' will have his [[{{Your Head A Splode}}head explode]] under these conditions (although it takes more than most other examples on this page).
* In ''TwoKinds'', if a character goes beyond a LuminescentBlush, he (or she) [[http://twokindscomic.com/?p=352 starts to nosebleed]].
* Almost [[http://img177.imageshack.us/img177/7839/asnano61yo9.jpg every male]] in the ''MagicalGirlLyricalNanoha'' FanWebComic ''[[http://ashitahadocchida.sakura.ne.jp/top.html A's/StrikerS Nano]]'' are prone to this... [[http://img177.imageshack.us/img177/46/strikersnano29trmp6.png a lot of the females too]], come to think of it.
* ''{{Tailsteak}}'' [[http://www.tailsteak.com/archive.php?num=274 explains it all]].
* ''QuestionableContent'' [[http://questionablecontent.net/view.php?comic=1528 does it]] with a deconstruction-y feeling.
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[[folder:Web Original]]
* In ''ShinjiAndWarhammer40K'', lust-induced nosebleeds are usually associated with Kensuke or Mana Kirishima, but in one memorable instance ''Asuka'' has this reaction (much to her horror and confusion) to seeing Rei in [[{{Meido}} a maid outfit]]. Rei being Rei, she may have done this deliberately.
[[/folder]]

[[folder:Real Life]]
* See [[TroperTales/{{Nosebleed}} Troper Tales]] for personal accounts of this trope.
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