5 Things Your Hair Can Tell You About Your Health

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Your hair isn't just something you have to deal with every morning, it's a part of who you are, and there are things it can tell you about your personal health.
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Patchy hair loss:
Unusual hair growth:
Thicker hair growth:


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SciShowscienceHankGreeneducationlearnhairhygienebaldnessbaldcradle capseborrheic dermatitissebaceous glandssebumMalasseziaanagen phasecatagen phasetelogen phasealopeciacytokinetelogen effluviumT cellslanugo hairhirsutismandrogensbrushbeardwhisker



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تعليقات 584
rainynight02 9 أيام قبل
Bio-sex females there's a stupid word again what female is not biologically female?
Liusila 15 أيام قبل
7:30 wtf is this. I have tiny transparent hair pretty much everywhere. I’m not anorexic!
Liusila 15 أيام قبل
I’ve had dandruff and an itchy spot on my head. It really doesn’t respond to any shampoo and I know it’s part of a bigger thing because when it gets worse a few other areas around my body get really dry and start to itch. Wtf.
The Friendly Atheist
The Friendly Atheist أشهر قبل
I started going bald at 16 or so
ღ Ashimari ღ
ღ Ashimari ღ أشهر قبل
I leave the floor coated in hair wherever I go but I have a super thick coat of hair, even with shoulder length, it takes a ton for it to dry It's been months like this and no notorious change, but as the video says, probably has to do with Ballet hahah
MsMcmoe 2 أشهر قبل
Hmm, didn't hear it mentioned that a persons' thyroid may be out of balance, or there's a nutritional/vitamin deficiency .
Yo Soybean
Yo Soybean 2 أشهر قبل
My mom has alopecia, and she has no hair at all. I was wondering, is it genetic?
limpnjen 2 أشهر قبل
That first picture of the baby head made my skin crawl.
Mr Niceguy
Mr Niceguy 2 أشهر قبل
The title doesn't fit to the content. Should be... "5 (interesting) hair conditions"
Maurice Spence
Maurice Spence 2 أشهر قبل
I noticed I had alopecia areata after a visit to the barbershop. I thought I was aging way fast or something
Rachel Holt
Rachel Holt 2 أشهر قبل
Shedding more frequently can also be caused by thyroid imbalances
Morris Chen
Morris Chen 2 أشهر قبل
Thank you for using trans/gender-inclusive language!! This just made me love you and your channel even more (which I didn't know was possible)
Mathew Subritzky
Mathew Subritzky 2 أشهر قبل
hair loss can be a result of spinning on your head.
Lucia Jayne
Lucia Jayne 2 أشهر قبل
@sciShow ... about personal health ... what about a video in oil pulling. Is there science behind it?
Michael P.
Michael P. 2 أشهر قبل
Going through the ninth month of tellogen effluvium, the hair has still not recovered. I've learned my lesson with stress.
Letolz Velostoll
Letolz Velostoll 2 أشهر قبل
"menopause can affect someone's..." you can tell "menopause can affect a woman's..." is being avoided, because men can undergo menopause now.
Nightshade Kelly
Nightshade Kelly 2 أشهر قبل
Why does hair grow long on your head but not your arms and legs
Nightshade Kelly
Nightshade Kelly 2 أشهر قبل
Im 16 and have gray hair
Lio Jio
Lio Jio 2 أشهر قبل
more like 61
Nightshade Kelly
Nightshade Kelly 2 أشهر قبل
If goku or vegetas hair fell out it would be a nightmare
Professsor 2 أشهر قبل
My scalp is itchy...
Elly Arrow
Elly Arrow 2 أشهر قبل
Omg, bio female... as in opposed to what... artifical females?? O.O
- 2 أشهر قبل
One time I suddenly developed alopecia barbae which caused a small, circular bald spot in my beard (which was still visible even after shaving because it was completely hairless) and it was caused by stress and went away after a while.
chad x
chad x 2 أشهر قبل
Right. So leave it to your incompetent doctor.
Hypatia Ravenclaw Sklodowska
"your hair isn't just something that you have to deal with every morning" - first time someone accurately described hair imo
Rug46 2 أشهر قبل
Where are my fellow red hair bois :P
Luka Cvitkovic
Luka Cvitkovic 2 أشهر قبل
Ah yes, seborrheic dermatitis, a simple spell, but quite unbreakable
DaBlondDude 2 أشهر قبل
Nice disclaimer lol, though kinda sad it's needed
Nishant Sengar
Nishant Sengar 2 أشهر قبل
Nicely explained, but what causes premature greying of hair, can that be treated? I have seen even the 5 years old kids start to have grey hair.. is it all diet dependent?
Nishant Sengar
Nishant Sengar 2 أشهر قبل
@gingergamergirl98 I thinks it's more to do with your diet, especially if it lacks vitamin b6, b12 and D..
gingergamergirl98 2 أشهر قبل
Nishant Sengar AFAIK it’s genetic
Jeremy Pickett
Jeremy Pickett 2 أشهر قبل
Too many comments way funnier than me :) Thank you Sci, this happens to the best of us and shouldn't be feared. I had a severe health thing, three months later my hair fell out, three months after I am back to normal. Well, normalish :) Talk to your doc, and we dont judge.
Paul Sutherland
Paul Sutherland 2 أشهر قبل
He said "give you a heads up."😛🤤
blub232324 2 أشهر قبل
2:20 looks almost like Matt Parker :)
edi 2 أشهر قبل
Why are men and women storing fat differently. What´s the advantage of storing it mostly in the belly, rather than spread over a wider area? Since, we´re already on topic: why do many Afro-american women have butts that seem to defy gravity (not sagging, less bouncing and no moon-surface)?
Nikki Williamson
Nikki Williamson 2 أشهر قبل
My hair started falling out in 2017. It happened because I was very ill and on a lot of medications. I got better, came off the meds and it started to grow back thicker. Now I have a tonne of baby hairs that aren’t yet long enough to tie up but are long enough to get in my eyes...
Peldyn - Life with Cats
Peldyn - Life with Cats 2 أشهر قبل
I had a telogenic event and it was scary! Happened after I had a thyroidectomy. Lost most of my hair. Thankfully once my thyroid meds were adjusted my hair grew back.
IncontrovertibleTruth 2 أشهر قبل
Well many people look up things on the internet first because at least in America so many people can't afford health insurance also people want to be educated about what's going on with their bodies
TheSzyko 2 أشهر قبل
Please make a video about why your turn down the music volume when backing into a parking lot ( and what science is behind it). Yeah for sure it´s because of focus, but why does everyone do it? Maybe there is more to it. Much love, thx for your show!
X3DN 2 أشهر قبل
My hair is bleached and colored
Gibraltar 2 أشهر قبل
Duuude my hair is so long and I am a boy....my hair is longer than 80 percent of my female class mates.
Ibolya Szijgyarto
Ibolya Szijgyarto 2 أشهر قبل
Traction alopecia *cough*Jojo Siwa*cough*
veksu9 2 أشهر قبل
Dandruff is caused by fungus. In special shampoos there are ingredients which kill those microorganisms. You are missleading people...
Jamail44 2 أشهر قبل
I have really really bad dandruff, even if I wash my hair.
Sharon Johnston
Sharon Johnston 2 أشهر قبل
I actually have alopecia areata I always thought it was stress related. My dads a barber and in barber college he learned about hair disease and the way hair grows and he told me what it was and that it’s mostly stress related and it’ll grow back so I never really looked in to it I mean it’s probably only happened like 4 or 5 times in 3 years.
That Sagittarius Girl
That Sagittarius Girl 2 أشهر قبل
And here I am with my trichotillimaniac hands
pyukumuku 95
pyukumuku 95 2 أشهر قبل
My hair told me it was too hot so i cut it off. Im bald now.
David Oh
David Oh 2 أشهر قبل
I’ve noticed that ever since I started growing my hair longer, I’ve been losing a SIGNIFICANT amount of hair daily. I’m a male. Does anyone know why?
Chapter Eleven
Chapter Eleven 2 أشهر قبل
me, with an oily scalp and dandruff: sigh
Feral Crafter
Feral Crafter 2 أشهر قبل
Every time I go to a doctor, I'm billed thousands of dollars for a diagnosis of "I don't know" .... Sooo why go to a doctor?
Ico 2 أشهر قبل
Sometimes I get extremely stiff, translucent hairs on my arms (only ever noticed it on my arms) that are very easy to pull out and sometimes there’s are multiple coming from the same follicle. Does anyone know what this is or what causes it?
Rachel Swanson
Rachel Swanson 2 أشهر قبل
I have dandruff. It started around 12 years of age. I've tried all kinds of dandruff shampoos none work. I have to only shampoo my hair once a week sometimes twice. I use shampoos for Africans because they're not as drying on my scalp. I also have to oil my hair once a week to two weeks. My son whose reaching 12 years old just developed dandruff too. I think its a hormonal thing rather than a fungus thing as you mentioned. Why would it only start around the time hormones change in a person's body? I'm so tired of dealing with dandruff.
John Smith
John Smith 2 أشهر قبل
8:24 "All sexes"? Seriously? You're a scientist. You know better.
zacharymli 2 أشهر قبل
John Smith They are using very precise language to describe exactly what they are referring to in each case they refer to sex, gender, or biology. When they say all genders they are including humans who are intersex, because the thing they are referring to is equally applicable in everyone’s case. Science is well aware there are more than 2 biological realities.
TheMeganano 2 أشهر قبل
I've been pretty self conscious about my hair ever since I was small. I've always had white hairs and I dunno why...
Lucky 2 أشهر قبل
I am 10 and have a long white hair and my friends say it’s cool but ain’t my opinion
zacharymli 2 أشهر قبل
Lucky Like one hair, on your head? Sounds kinda neat to me, but if you dislike it just pull it out. It may grow back sooner or later, and for some reason white hairs can seem to grow way quicker than any other hair, but you can just pull it out again. No big deal.
paul mryglod
paul mryglod 2 أشهر قبل
Mine is abandoning my head. What does it know?
BeUnotATVrobot 2 أشهر قبل
Actually 6, that also you are a brainwashed TV Robot
Michael Seydor
Michael Seydor 2 أشهر قبل
Thanks SciShow for talking about alopecia areata. I have alopecia universalis which is a form of AA with total hair loss over the entire body. AA is one of the least understood and under-researched autoimmune disorders out there since there is no physical pain/restrictions. However, the negative psychological and societal effects can lead many of us to develop mental illnesses among other side effects. Any coverage on our disorder is appreciated as we collectively are trying to create awareness to fast-track research and clinical trials. Woohoo!
69ouroboros69 2 أشهر قبل
Biosex ... I was wondering what the correct term for that is. Thanks so much!
Dragon Landlord
Dragon Landlord 2 أشهر قبل
my epilepsy medication makes me shed, but i've got an thick head of hair so it's just a mild annoyance.
Falbert Forester
Falbert Forester 2 أشهر قبل
I disagree with the notes towards the end of, "It's impossible to diagnose conditions from your hair" - as I can recall reading about several cases where it's been proved that someone was poisoned with arsenic - provided by testing their hair.
gingergamergirl98 2 أشهر قبل
Falbert Forester Yeah, with the correct equipment. Pretty sure he meant based on looks alone
David Ledesma
David Ledesma 2 أشهر قبل
Anyone gets sleepy when watching these videos?
crissyisajojofan 2 أشهر قبل
You let a Chinese man doo doo in your mouth
The Wallaby Edits
The Wallaby Edits 2 أشهر قبل
Switching to a scrunchy helped from pulling my hair out
Dastreus 2 أشهر قبل
I just have a couple shampoos for dandruff. THIS EPISODE MADE ME ITCHY
lexitaffy 2 أشهر قبل
hi my server was raided on discord if you have it can you please join the raider banned everyone and i worked hard to gain alot of members so that upseted me i had 500+ members and 400+ were banned please join and share this with your friends and invite them :( i just wanted to be nice and i try to trust people but i always get screwed over so i invited their bot discord.gg/UHkRkqG please like this comment for it to be seen please
Taylor Craig Newbold
Taylor Craig Newbold 2 أشهر قبل
Male pattern baldness is a symptom of a weak moral constitution.
Are Gup
Are Gup 2 أشهر قبل
Am sorry but u really need to add other medical conditions and to go to ur dr for more deep eval.. Like a lot of dandruff for a person that never had it might be HIV sorry meant to say medical emergency symptoms.. or stop using others ppl brushes.. Ringworms causes bald patch on head.. ur body has a self warning signal to u to say hey go to the dr or something is wrong here do something before us to late. Just a little more in depth would b nice alway end with see a professional.. like excessive hiccups 4 days might also b a signal for the autoimmune disease hiv saying hey have this check out by a dr.. someone with halitosis should not blow food for a baby.. or kiss u u will get that bacteria .. meds can also do damage to the human system
Eric Cartman
Eric Cartman 2 أشهر قبل
#40 on trending
Rose L.
Rose L. 2 أشهر قبل
How about I just have someone give me a Amber Rose haircut and in no time it will grown evenly? What do you think?
Bruce Ramirez
Bruce Ramirez 2 أشهر قبل
Jojo siwa where u at
Danielle D
Danielle D 2 أشهر قبل
I had adult cradle cap!!! It was so weird. I think it could've been partially because I'm a model, and people are always putting weird products in my hair that I have no control over. I also traveled a lot and lots of different phs in the water etc, i suppose could contribute to the microbiome. I also just think it's important to scrub your scalp a bit with your nails, I read somewhere that this causes irritation so I stopped scrubbing my scalp with my nails, just my fingertips, and the buildup became more severe. Sometimes you gotta just dig in there!! Hah.
Deyvid's Channel
Deyvid's Channel 2 أشهر قبل
I'm dying
Madi Kuhn
Madi Kuhn 2 أشهر قبل
Jojo siwa should watch this video
Katie Kane
Katie Kane 2 أشهر قبل
Why do I get a "hair headache" when I ask it to go a different way? Really annoying btw
Emelia Smith
Emelia Smith 2 أشهر قبل
When I was in my teens I had a brief interesting period where two or three small patches of hair on my body just lost all pigmentation; My doctor couldn't work out why but put it down to some sort of stress reaction 🤷🏻‍♀️ (The pigmentation never return to those patches either)
Elizabeth Meier
Elizabeth Meier 2 أشهر قبل
😲 I'm nearly positive the first one you talked about is what is wrong with my scalp. It's been an issue for years. I just thought I had really bad dandruff 🤷
Molly Stringer
Molly Stringer 2 أشهر قبل
I'm positive that's what happened with my scalp too. One day it just stopped though? Idk, but there were like patches where it was really bad and I couldn't even push my hair over to the other side without feeling it.
Demon Sword
Demon Sword 2 أشهر قبل
those Damn T-saibous
Rania Toubia
Rania Toubia 2 أشهر قبل
What's a biosex female? Is it different from a woman ?
Wanda Richardson
Wanda Richardson 2 أشهر قبل
So, we are all mutants👌
vamsi krishna sadhu
vamsi krishna sadhu 2 أشهر قبل
Can you please make a video on ITP Idiopathic Thrombocytopenia Purpura. It is a rare auto immune disorder and there is no much information about it. Thanks.
Zee Hut
Zee Hut 2 أشهر قبل
Where is Jojo Siwa!?
Greg West
Greg West 2 أشهر قبل
Back hair is not weird. I agree it looks awful, but there is a strong correlation between High functioning creative cognition and hirsuteness. www.independent.co.uk/news/the-hirsute-of-higher-intelligence-1328285.html
Linda Ciccoli
Linda Ciccoli 2 أشهر قبل
When I went through menopause, my thick hair thinned out a great deal.
GiggitySam Entz
GiggitySam Entz 2 أشهر قبل
I'm loving the gender tolerance in your videos ♥
GiggitySam Entz
GiggitySam Entz 2 أشهر قبل
Thanks for such a well-researched and well-explained video!
Ghormi Bear
Ghormi Bear 2 أشهر قبل
I have PCOS and if i didn’t shave everyday I would have a beard it sucks and makes you feel less of a woman 😞
lillypod21 2 أشهر قبل
I learned a crapton about telogen effluvium after I started losing clumps of hair a few weeks after recovering from dengue fever. I know it's just hair and that it grows back, but suddenly losing that much hair so quickly is really distressing. It's been two years since the rapid hairloss stopped, but I feel like my hair has not gone back to how thick it was before TE.
Thekrabbman 2 أشهر قبل
If my scalp hurts a little after wearing a manbun (usually just after long periods of time), should I stop with the manbun or just use a "Lighter" bun?
Dávid Kertész
Dávid Kertész 2 أشهر قبل
biosex females
NILUFA YESMIN 2 أشهر قبل
Hey SCI. SHOW can you tell me what the heck is QUANTUM BIOLOGY?
Newtone 2 أشهر قبل
Idumbbbz need to do an episode here
Florin Curteanu
Florin Curteanu 2 أشهر قبل
How to get a thick healthy hair: - Eat healthy (for a light blood); - Hidratare enough (2 litres of water per day); - Don't stress or get upset (because the stress hormones attack the hair follicles); - Go outside and get some vitamin D (but don't stay to much in the sun), or take vitamin D medicals if you are a vampire; - Wash it 1-2 times a week, especially if work in dusty places (no more often); - Don't excess with the comb or with special sprays/gels (try to let the hair free, natural, to breathe); - Be happy and laugh often.
TheFourthWinchester 2 أشهر قبل
I do not have the body of The Rock. I cannot afford to go bald :( I recently lost a lot of hair due to Typhoid :/
Pink Bunny
Pink Bunny 2 أشهر قبل
I would love to have a looser hairstyle but its so frizzy that it has to be in a bun.... Well, gotta deal with a few hair falling out.
Joshua D
Joshua D 2 أشهر قبل
Remember, according to every advertisement featuring it, having visible dandruff means you will never get laid. The woman will see the flakes, have a disgusted expression, and walk away. Every time.
Joy Bradford
Joy Bradford 2 أشهر قبل
No more tight ponytails for me. No wonder my hair brush is so full of hair when I am done brushing it! Thank you for your great videos!
chickenfoot87 2 أشهر قبل
I also have PCOS and it makes me grow a lot of body hair. I also have a deeper voice than is usual for a girl.
Glider5858 2 أشهر قبل
If only I had hair loss around my anus...
chickenfoot87 2 أشهر قبل
A fever changing the hair can happen in animals too. It's called a fever coat and can cause kittens and puppies to have a weird fluffy coat after an illness.
victorpapaavp 2 أشهر قبل
I have exactly 0 non black hairs on top of my head, but there's dozens of blonde and red hairs in my beard. Any idea why? Am I a closet ginger?
gingergamergirl98 2 أشهر قبل
victorpapaavp When my grandpa grew a beard, it had a reddish tinge to it. I suspect it’s something to do with carrying the allele, but not expressing it. Maybe beard hair is influenced by both alleles? Idk but it’s definitely, like, a thing that happens (facial hair being a different color to scalp hair)
Rachel Losacco
Rachel Losacco 2 أشهر قبل
In high school I got mono and was bed ridden for 3 weeks. About a month later, I was pulling my hair out by the handfuls (though I didn't look bald, thankfully). I think it might have been telogen effluvium -- over the next few months the missing hair was growing back and I had an awkward "halo" of new hair on top of my regular long hair. But is it common that it should kick in so much later after my illness?
CHEETAH RACE In YouTube 2 أشهر قبل
It is not problem.hair has external functions for body ,not internal.not worry about it either u have gray , brown , black hairs.i will recommend don't scratch or pull out gray hair if u have.DONT TAKE STRESS IS IMPORTANT AND BE HAPPY
Zman Jace
Zman Jace 2 أشهر قبل
Well I'm not even 2 mins in and my head itches. Great.
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