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Our body is an incredible machine, but it's also a bit of a mystery. Despite spending our entire lives in this amazing, complex vessel, we often know surprisingly little about it. However, while it might be thrilling to discover fun facts about the human body, there are also some unsettling truths you might prefer to ignore.

When u/Beneficial_Cry2061 asked on Reddit, "What is a disturbing medical fact that not many people know?" the responses started pouring in. People shared some truly unsettling facts that might just make you squirm. Dive in and discover these strange realities of the bodies we live in.

#1

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps The truth about HeLa cells. These cells grow and divide constantly and are used in all sorts of medical research to discover cures for cancer and other diseases. They were originally harvested from a woman named Henrietta Lacks who had cervical cancer that was fatal. She died in 1951. Her family didn’t know that her cells were even being used until recently. These cells were basically stolen from Henrietta by a doctor and he made millions from them, and Henrietta’s family never knew. Once they found out, they finally settled with a biotech company for an undisclosed amount. This woman has basically saved so many of us, and we all owe her so much.

KweenBee1986 , Fayette Reynolds M.S./Pexels Report

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#2

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps The first doctor to suggest hand washing before surgery was laughed at repeatedly by his colleagues.

thedoc617 , Ketut Subiyanto Report

#3

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps A scary number of people wind up with vertebral artery dissections and strokes from chiropractic cervical manipulations. How do I know? I've seen several perfectly healthy women in the prime of their lives as organ harvests in my OR.

AlternativeSolid8310 , Pixabay/Pexels Report

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#4

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps We got to modern medicine by grave robbing, crime, and accidents. it wasn't always legal to be a doctor.

AvocadoPizzaCat , Artem Maltsev/Unsplash Report

#5

A fertilised egg can fail to develop normally and grow into a malignant tumor. It's called a molar pregnancy and I'd be very interested in what the "life begins at conception" crowd has to say about it.

Paladin2019 Report

#6

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps The health of your teeth, or lack thereof, can cause heart disease. The bacteria that infect the gums and cause gingivitis and periodontitis also travel to blood vessels elsewhere in the body, where they cause blood vessel inflammation and damage.

If you are diabetic, and don't know it--or do, but have problems controlling your sugars, it can severely harm your teeth. On the flip side? Having bad teeth can severely affect your blood glucose as a diabetic. It can become a s****y cycle.

And yes--mentioned earlier, but if you get an infected tooth, that infection can travel to the brain or blood very fast.

And yet, teeth are still considered "luxury bones," with maintenance, cleaning, and dental care hardly ever being covered by insurance.

Pinkatron2000 , Anna Shvets/Pexels Report

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#7

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps Chest compressions are violent. Just let your 91 year old grandma go.

Shomer_Effin_Shabbas , Martin Splitt/Unsplash Report

#8

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps A study by Johns Hopkins in 2016 cited that medical errors are probably the 3rd leading cause of death in the USA, following heart disease and cancer.

Errors were: Wrong Diagnosis. Incorrect dosage or wrong meds. Surgery errors and the biggest, poor communication between staff.

It is also thought that this study is also correct in the UK and EU.

LegalAdviceHope , Pavel Danilyuk/Pexels Report

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#9

Not necessarily a medical fact, but a reality check: Doctors don't have everything figured out, they are just human like the rest of us. Just like how us software developers search Google to troubleshoot something when we are stuck, they do too. Shows like Dr. House portray doctors as this infallible walking medical encyclopedia. It's all fiction. So, always be open to getting a second opinion if something isn't working.

hunnilust Report

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#10

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps That your body fights off 10,000 events that would cause cancer daily.

ScaredVacation33 , National Cancer Institute/Unsplash Report

#11

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps Cat scratch fever is real, and can be deadly. I know someone who spent 2 weeks in hospital from it and it was his cat.

lespaulstrat2 , Александр Бойко/Pexels Report

#12

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps Chainsaws were originally invented for childbirth.

Vibrators were invented because doctors were manually massaging women to hysterical paroxysm (orgasm) to cure their “hysteria” and they got too lazy to do it by hand.

NoDanaOnlyZuuI , Pixabay/Pexels Report

#13

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps The man who developed the pap smear did so with the help of his wife, who received pap smears almost daily for 21 years.

>Volunteering as an experimental subject: For 21 years, Mary allowed her husband to sample her cervical cells and vaginal fluids almost daily, which he would then smear on glass slides and examine under a microscope.

PerAsperaAdInfiri , National Cancer Institute//Unsplash Report

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#14

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps There are so many wild things living in the microbiome of a human's skin. Demodex are a great example; little mites that live near human hair follicles. They look horrific and they feed off of sebum, sweat, dead skin etc.

Many things are localized too; the things living in your eyelash follicles are not the same as the ones living on your elbows. We're a whole universe, and even our skin is colonized by bizarre little f*****s

Edit; a lovely little quote I found online, about Demodex

"When you sleep, the mites come out of your skin’s pores, mate, then go back into your skin to lay eggs."

Sexy.

no0neiv , Jenna Hamra/Pexels Report

#15

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps There is no cure for rabies unless you catch it immediately and get injections. Once symptoms show it is too late and the person will die .

ChrisShapedObject , National Institute of Allergy and Infectious Diseases/Unsplash Report

#16

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps 80% of amputations are due to diabetes.

Watch your health, people.

314159265358979326 , Anna Shvets/Pexels Report

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#17

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps That your immune system can go rogue and just randomly start eating things you need to stay alive when there's no foreign invaders to fight against.

anon , Diana ✨/Pexels Report

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Lsai Aeon
Community Member
2 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is called an Auto Immune Response. It can happen randomly or you can have an Auto Immune Disease. I have, diagnosed, FIVE autoimmune diseases. Also, fun fact once you have one, it's easier to get more

Lsai Aeon
Community Member
2 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Auto Immune disease, because I'm the only thing strong enough to kick my own azz

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Lsai Aeon
Community Member
2 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Celiac, Meniere's in both ears, Fibromyalgia, Hidradenitis Suppurativa, and Arthritis. I feel ya. Good luck

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LapCat
Community Member
2 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Multiple sclerosis is one of many examples. I was diagnosed in 2008. I’m now on treatment every 6 months which I am grateful for.

LottaG
Community Member
2 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I was diagnosed with autoimmune hepatitis at age 18 and have been on meds ever since (26 years now). It kinda sucks because I don´t like swallowing pills but hey at least my liver is still working pretty good and I´m still here! Got to stay positive. :)

eMp Tee
Community Member
2 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Went to bed one evening feeling great. Woke up next morning with chronic pain and unable to move other than reaching phone to call for ambulance. Polymyalgia Rheumatica. No known cause. No known cure. Just a number of medications that could treat the symptoms (prednisolone, methotrexate and hydrochloroquine)

B Jean the Jelly Bean
Community Member
2 months ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

After months of pain, low grade fever, unintended weight loss and extreme fatigue. Tested for everything from Lupus to Leukemia! Finally they did CRP and ESR blood test revealed it was Polymyalgia Rheumatica. Nearly 2 years of prednisone, and methotrexate it finally went into remission. ( It's never really "cured") fast forward to Covid... I got the "jab" and within 3 months I relapsed. The PMR had returned....with a vengeance! All my inflammation markers had risen at least doubled since the first diagnosis! I've now been off the prednisone about a month and have been tapering off the methotrexate. Praying this will be a long lasting remission this time. And YES I believe the vaccine caused the relapse.

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AndThenICommented
Community Member
2 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

When I was 2 I developed nephrotic syndrome. Essentially, my body just started attacking my kidneys. No family history, just random. I thankfully survived after about 3 years of heavy immuno suppression via special shots. Now, it’s like nothing happened except I have general autoimmune problems like food sensitivities and prone to inflammation. Very strange and of course super scary to think about

Zaach
Community Member
2 months ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Your eyes have a different immune system from the rest of your body - if they ever get mixed they fight to your death

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#18

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps When you die, the bacteria that used to help digest your food, now digest you….

EssKayAarr , CDC/Pexels Report

#19

That doctors don’t know everything and you can go years without getting a diagnosis while being in unspeakable pain. I’m going through this right now.

19 months of this. I can’t handle another few more. How can something that hurts this bad and feel like a broken rib not show up or be known after almost two years of tests? At the end of my rope here.

impreprex Report

#20

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps At any moment anyone can just randomly drop dead from a brain aneurysm. It’s more or less common for certain people, but it can literally happen to anyone at any age at any time.

ShadoOwEd , MART PRODUCTION/Pexels Report

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#21

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps Cold sores can cause inflammation of your brain. It’s called herpetic encephalitis and is likely to cause permanent brain damage even with treatment. It can also be caused by shingles, so getting the shingles vaccine is more important than you think.

UnapologeticAberrant , Anna Shvets/Pexels Report

#22

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps When you have surgery and your organs have to be scooped out to access something else, they don’t put them back where they were. They just kinda put it all back in and our organs just shift back to where they were. I learned this fact when I went to stand up after having a csection.

hotmama1230 , Europeana/Unsplash Report

#23

ADHD symptoms are heavily influenced by estrogen levels, and yet ADHD was not studied in girls/women until 2017.

Pandaplusone Report

#24

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps Not sure how unknown it is, but at any given time without warning your uterus can just fall out. And unless it’s fully dangling outside of you, the doctors will just tell you to try to shove it back in there.

cherinoia , Nadezhda Moryak/Pexels Report

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#25

Can I give two? They’re disturbing to me.

1)The prevalence of middle ear infections in children from 0-6 y/o.

Please don’t ignore this. Have hearing tested annually, the impact on schooling, speech, milestones etc. is not to be taken lightly.

2) Untreated hearing losses, under stimulated brain possibly leading to accelerated risks of early onset memory loss, dementia etc. The worse the hearing the higher the risk. Just get your hearing tested annually, you’re never to young for a hearing loss man.

MicIsOn Report

#26

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps Oxygen poisoning is a thing. Too much O2 in your body can kill you. 


But don't worry, you won't die from breathing too hard. It's mostly an issue for divers and other people who breathe pressurized breathing gases.

24benson , Pixabay/Pexels Report

#27

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps Not a human example (probably), but sometimes cows, goats and other animals get pregnant but instead of giving birth to a normal lamb/kid/calf it gives birth to an *"amorphous globosus"*, a spherical mass of flesh with an outer layer of skin with hair or fur, and the inside a jumbled mess of guts and tissues and sometimes teeth. They never have brains or spinal cords though, so they're always stillborn and nonviable.

Heroic-Forger , Matthias Zomer/Pexels Report

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#28

Everyone who's had to deal with a brand new baby's had to deal with it, but a baby's first poop (meconium) is very thick and sticky and hard to wipe off. What most people don't know is what it's made of.

Around halfway through a pregnancy, a fetus develops hair called lanugo all over their body. They shed most to all of it before they're full term. That hair is shed directly into the amniotic fluid, which is then ingested by the fetus, and (hopefully) stays in their intestines until birth or right after.

So, basically, fetuses eat their own hair, and since amniotic fluid is swallowed and excreted, you could say they're swimming in their own pee.

Also, chainsaws were invented for childbirth.

ChaoticForkingGood Report

#29

Some hospitals allow medical students to practice on patients who are under anesthesia. Without the patient's knowledge/active consent.

It is completely f****d up. They hide technical consent in overly broad terminology in the papers you sign when you go in for an operation.

They argue that they do it this way because it is hard to get volunteers for students to practice very invasive internal exams.

dirtymoney Report

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#30

Sepsis is a horrible way to die . Seen it never wanna see it again . Poor bastard had horrible death and nothing could be done about it.

anon Report

#31

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps The eyelash mite lives mainly on the human eyelash and is an 8 legged parasite that eats skin and oil. They stay hidden in the hair follicles during the day and emerge at night to eat, lay eggs and excrete waste. And that is why you should wash your face in the morning.

RandomNameGenFail003 , Kush Kaushik/Pexels Report

#32

Prions.

Edit- prions are misfolded proteins that cause other proteins to misfold in your body and it causes cell death. They affect the brain and aren't curable. They are also extremely hard to destroy. A few prion diseases are:

Mad Cow Disease

Kuru

Creutzfeldt–Jakob disease

Fatal Familial Insomnia (nightmare fuel)

Chronic Wasting Disease.

stilettopanda Report

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#33

Your tonsils can turn against you and hurt your immune system. I had mine taken out at age 21 after an abscess nearly killed me.

Buckmeg Report

#34

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps When you get a kidney transplant, unless your original kidneys are diseased, they just lEAVE THE OLD ONES IN THERE. OLD DEAD KIDNEYS JUST CHILLING

also- fallopian tubes are not connected to ovaries. they just float in the general direction of the ovaries and do their best to vacuum up eggs as they get popped out (kind of like a pimple bursting) out of ovary pores? so the eggs just get popped wherever and you gotta cross your toes and hope your weird little vacuum tubes are aiming right that day???

fleatsd , Europeana/Unsplash Report

#35

There's a certain part during the cremation process where the meat is perfectly cooked.

nexxai Report

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#36

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps Poop can come out of both ends.

anon , Vie Studio/Pexels Report

#37

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps If your immune system figures out you have eyes you will go blind.

Ketil_b , Pixabay/Pexels Report

#38

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps Humans have both light meat and dark meat due to type 1A and type 2B muscle fibers. However, humans are lean and not very calorie dense, so if you're already starving cannibalism doesn't do much good.

SailorVenus23 , Samer Daboul/Pexels Report

#39

In canada and the states, doctors and residents are allowed to perform gynaecological exams on women under general anaesthetic, in order to provide students and residents with experience performing pelvic exams. this is typically not disclosed to the patient, and is justified as being part of receiving treatment at a teaching hospital.

king_eve Report

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#40

Lots of things we know about resuscitation, trauma surgery, emergency medicine etc, were learned through gruesome vivisective experiments on WWII prisoners of war. Basically, every life saved now was paid for by a PoW tortured to death in a camp.

SillyTalks Report

#41

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps In the 70’s they thought babies didn’t feel pain so they preformed surgery without anasteisa.

wetlettuce42 , Stéf -b./Pexels Report

#42

I just learned about SJS, where you get an adverse reaction to a medication by your skin falling off. It happens at seemingly random too, but some medications are more prone to cause it. Fun stuff.

FroggiJoy87 Report

#43

If you sever your spinal cord you can get a condition called priapism (erection that doesn't go down). Treatment is draining the blood via syringe from the erect penis (or rarely, leeches).

Blackdomino Report

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#44

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps I think you can get a tooth infection and it spreads to your brain n you go bye bye.

CalmLykEhBomb , cottonbro studio/Pexels Report

#45

That the father of gynecology was a sadistic f**k that did horrific things to enslaved women.

writekindofnonsense Report

#46

All smells are particulates. When you have the displeasure of walking into a recently used bathroom and smell the smells the last person left, you can rest easy knowing that their are tiny microscopic particules of their stools now firmly implanted in your nose. And in your mouth if it was open. You're welcome.

MusicalChefIrie Report

#47

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps If the anesthesiologist f****d up you wouldn't know

edit:
since everyone is sharing their story i'll share mines. i was diagnosed with bladder cancer early 2022 with signs i ignored late 2021. between april 2022 - june 2023 i went through 5 surgeries to remove the tumors in my bladder. they kept coming back.

mentally preparing myself for the first trans-urethral resection, pre-op nurse just straight up told me if the anesthesiologist f****d up i wouldn't know..or wouldn't feel anything if s**t hits the fan. what a f****n pep talk huh? hahah.

christmas 2023 i was finally clear. i still go to chemo (doublet therapy?) and see a catheter :( for gemcitabine/docetaxel.

airforkjuan , Anna Shvets/Pexels Report

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#48

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps The beginning of birth control was originally an experiment and was wildly irregulated.

Newkid92 , cottonbro studio/Pexels Report

#49

The ovaries and fallopian tubes are not connected, so when an egg is released the fallopian tube sucks it up like a straw. Ladies, this also means that any seamen that makes it to the fallopian tubes have an open door into your abdominal cavity.

OpheliaBalsaq Report

#50

50 People Share The Most Bone-Chilling Medical Facts That Might Give You Goosebumps The placenta that is found in humans and other live-birth mammals came about from a distant common ancestor being infected with a virus some 150-200 million years ago, and evolution doing its thing. If this infection didn't happen, we'd still be laying eggs.

Tired_Lambchop111 , Leah Newhouse/Pexels Report

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