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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General hair loss:
Patchy hair loss:
Unusual hair growth:
Thicker hair growth:





SciShowscienceHankGreeneducationlearnhairhygienebaldnessbaldcradle capseborrheic dermatitissebaceous glandssebumMalasseziaanagen phasecatagen phasetelogen phasealopeciacytokinetelogen effluviumT cellslanugo hairhirsutismandrogensbrushbeardwhisker






评论 557
Ali  Bentz
Ali Bentz 16 天 前
I had alopecia areata. It’s really embarrassing.
rainynight02 个月 前
Bio-sex females there's a stupid word again what female is not biologically female?
Liusila 个月 前
7:30 wtf is this. I have tiny transparent hair pretty much everywhere. I’m not anorexic!
Liusila 个月 前
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.
Willie Richard Johnson Projects
I started going bald at 16 or so
ღ Ashimari ღ
ღ Ashimari ღ 2 个月 前
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 3 个月 前
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 3 个月 前
My mom has alopecia, and she has no hair at all. I was wondering, is it genetic?
limpnjen 3 个月 前
That first picture of the baby head made my skin crawl.
Mr Niceguy
Mr Niceguy 3 个月 前
The title doesn't fit to the content. Should be... "5 (interesting) hair conditions"
Maurice Spence
Maurice Spence 3 个月 前
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 3 个月 前
Shedding more frequently can also be caused by thyroid imbalances
Morris Chen
Morris Chen 3 个月 前
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 3 个月 前
hair loss can be a result of spinning on your head.
Lucia Jayne
Lucia Jayne 3 个月 前
@sciShow ... about personal health ... what about a video in oil pulling. Is there science behind it?
Michael P.
Michael P. 3 个月 前
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 3 个月 前
"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 3 个月 前
Why does hair grow long on your head but not your arms and legs
Nightshade Kelly
Nightshade Kelly 3 个月 前
Im 16 and have gray hair
Lio Jio
Lio Jio 3 个月 前
more like 61
Nightshade Kelly
Nightshade Kelly 3 个月 前
If goku or vegetas hair fell out it would be a nightmare
Professsor 3 个月 前
My scalp is itchy...
Elly Arrow
Elly Arrow 3 个月 前
Omg, bio female... as in opposed to what... artifical females?? O.O
- 3 个月 前
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 3 个月 前
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 3 个月 前
Where are my fellow red hair bois :P
Luka Cvitkovic
Luka Cvitkovic 3 个月 前
Ah yes, seborrheic dermatitis, a simple spell, but quite unbreakable
DaBlondDude 3 个月 前
Nice disclaimer lol, though kinda sad it's needed
Nishant Sengar
Nishant Sengar 3 个月 前
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 3 个月 前
@gingergamergirl98 I thinks it's more to do with your diet, especially if it lacks vitamin b6, b12 and D..
gingergamergirl98 3 个月 前
Nishant Sengar AFAIK it’s genetic
Jeremy Pickett
Jeremy Pickett 3 个月 前
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 3 个月 前
He said "give you a heads up."😛🤤
blub232324 3 个月 前
2:20 looks almost like Matt Parker :)
edi 3 个月 前
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 3 个月 前
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
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.
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 3 个月 前
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 3 个月 前
My hair is bleached and colored
Gibraltar 3 个月 前
Duuude my hair is so long and I am a boy....my hair is longer than 80 percent of my female class mates.
Tammy Stockley-loughlin
If you ever cut it off, consider donating it. Pay it forward in thanks for whatever it gave you. Personally i'm a fan of a good head of hair as long as it is clean.
Ibolya Szijgyarto
Ibolya Szijgyarto 3 个月 前
Traction alopecia *cough*Jojo Siwa*cough*
veksu9 3 个月 前
Dandruff is caused by fungus. In special shampoos there are ingredients which kill those microorganisms. You are missleading people...
Jamail44 3 个月 前
I have really really bad dandruff, even if I wash my hair.
Sharon Johnston
Sharon Johnston 3 个月 前
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.
Catryn 3 个月 前
And here I am with my trichotillimaniac hands
pyukumuku 95
pyukumuku 95 3 个月 前
My hair told me it was too hot so i cut it off. Im bald now.
David Oh
David Oh 3 个月 前
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 3 个月 前
me, with an oily scalp and dandruff: sigh
Feral Crafter
Feral Crafter 3 个月 前
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 3 个月 前
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 3 个月 前
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.
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