black tongue and blue poo

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j 1000+ pointsk 500+ pointsl 100+ pointsm 1+ points - Newb
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Paige asks:

A couple of nights ago at about three in the morning, I went #2 and realized that my feces had turned blue! I thought I was just tired since it was three in the morning, so I went to bed thinking nothing of it. But then, the next day, it happened again... and again the next day. I have eaten nothing that was blue and can't think of what it could be. The ONLY thing I can think of is that it's maybe a vitamin deficiency, because a couple of months ago I became extremely low on vitamins and my tongue turned black! Help help help!





Dear Paige,

Let me see if I have this right:

Your poop has turned blue, and your tongue has turned black.

The blue poop I can probably blame on the ingestion of some sort of food coloring (green or purple dyes sometimes found in exotic alcoholic drinks are notorious for this), but the black tongue (if it persisted beyond maybe ten minutes) merits a visit to a DOCTOR.

I can't think of too many vitamin deficiencies or diseases prevalent in developed countries that will turn your tongue black, so I would be fairly skeptical that a simple vitamin deficiency really had anything to do with it. Most of us get enough vitamins from pizza and beer to ward off that kind of thing.

If either condition persists, for God's sake go to a doctor.

Follow-up: did you eat Pepto Bismol? That's been known to known to turn your tongue black.

Please be advised that I am only a Poonurse. I am NOT a medical doctor. Any advice I give should be taken moderate skepticism. Please consult a REAL medical doctor if you feel you have a serious medical condition.

-- Poonurse

Poonurse is an RN with 25 years experience in labor and delivery. Her qualifications include seeing a lot of poop, and owning a computer. Also, she works in Michigan, which she calls the asshole of the universe, so that's another bit of credibility.

Got a question for her?












202 Comments on "black tongue and blue poo"

The Shit Volcano's picture
Comment Quality Moderatorh 3000+ points

My sister studies nutrition and natural healing. Not even she knows of anything that gives you a black tongue and blue poo. Weird!

I'll have to try some of those dyes. Blue poo sounds cool!

I found Jesus! He was behind the sofa the whole time!

Tom's picture
m 1+ points - Newb

Did you take Pepto Bismol? That will turn your crap blue or black and give you a black tounge. It says so on the box.

The Shit Volcano's picture
Comment Quality Moderatorh 3000+ points

I've never had liquid Pepto turn my tongue black but now that I think about it the chewable tablets sure did. My teeth turned black, too. Blue poo, however. Never had it. Want it, but never had it.

I found Jesus! He was behind the sofa the whole time!

Stick's picture

OD'ing on black licorice tends to turn my turds green!

chad's picture

after my 16 birthday party, i had cupcakes with green frosting, i shat green for 2 days

The Shit Volcano's picture
Comment Quality Moderatorh 3000+ points

I am experimenting with Laffy Taffy right now.

I found Jesus! He was behind the sofa the whole time!

The Phantom Shitter's picture

Plue Poo: Eat an entire box of "BooBerry" cereal
for a meal. Guaranteed Smurf Loaf in 24 hours.

The mystery pooper's picture

i had the pepto tablets and i shat black for a couple of days. I called the emergency room at a hospital and they told me that the pepto did it. I want to know why and how pepto does it.

Sally's picture

ok, i had a consumer who pooped in the toilet and didn't flush it. staff called me in to look at it, it was actually torquise!!! it had started to um, break down, in the water and it was giving off this turqoise color, it actually looked like dye running off the poop...she hadn't eated anything since yesterday....this baffled me as well as my staff, no one has any idea what caused it to turn this color...it actually looked like easter egg coloring.....

Michele's picture

Can eating a lot of black licorice turn poop bright green? I am talking grass after a summer rain green. Very bright. The Crayola company would kill for this color.

Chris Rockwell's picture
m 1+ points - Newb

Michele - yes it can, depending on the dye that was used to make it black. Check out this Link:
www.poopreport.com/Intellectual/Content/
Dye/dye.html

norm vachon's picture

Black tongue will happen if you eat pepto chew tablets and then rince your mouth before bed with mouth wash this seam to trigger it for me....Blue poop I had once after I ate nothing but blueberries for 2 days..

ryan's picture

hey everyone, i dont really frequent this site but something has troubled my for the last week. i had eatin a few handfuls of blueberrys and i guess i didnt chew enough becuase their was visable blueberrys on my poo much like corn. i havent tryed any kind of follow up experiment and maybe my digestive system is out of wack. any thoughts?

frank's picture

i have a question. does anyone know what could cause poop to come out black? i read something about pepto but i have not taken any pepto. could there be something wrong with my intestines? someone help.

littlebill's picture

black poo with out injestion of dye's is a resault of dijesting blood (i.e. ulcer)

johnnyneon's picture

Great website, poo talk. Came here because I pooped green and had never seen that before in my life. I'm not talking about brownish green, or orangish green, but green like that person above said, freshly mowed grass. The water was bright green. I had catered a party the day before, working eleven hours without eating much of anything, no dyes to speak of, but in front of a grill for several hours sweating and sucking down water like a leaky faucet. I wonder if it has something to do with dehydration or something like that?
The first time I chewed pepto bismol tablets and went to bed, I was at a strange girls house at her dorm and slept with her and we both woke up with black tongues and thought we had gotten something from the other, but black tongue? Then I pooped and it was black too.

Fun with poo.

Try eating a couple sugar free chocolate bars with manitol. Now that's fun.

joanna's picture

FYI-- poop is green in the bowels. it is when it comes in contact with air as it is being expelled from the anus that it turns brown. i don't know how poop could stay green after expulsion though.

Anonymous Coward's picture

Hello all poopers!

this morning i didnt eat anything .. last night i just had a few burbons..

so i went to the toilet this mornin...
the poo came out black ... was a little freaked out but was all good...
Then i had some green tea
then it came out pale Green..lol
n my ass felt like it was on fire ...
ill let ya know what i shit next

Skellington05's picture

I woke up this morning and brushed my teeth. When i rinsed my mouth i found the water was black. I looked at my toung and it was black!!! But, thanks to the internet and this site I now know its because I had taken Pepto Bismol chew tabs the night before.
Skellington05

kelly's picture

ah he whole chewable pepto bismo turning your tongue black really helpd me from freaking out this morning!! its never happened with liquid kind guess the chewables!!

in love with tea's picture

yea i have been drinking a lot of lipton green tea with citrus, and i think that its making she poop green. I looked and sure enough, there was blue dye in it. good site. haha must share with my friends

The Shit Volcano's picture
Comment Quality Moderatorh 3000+ points

The chewables also have this bad habit of turning your teeth brown for a while.

I found Jesus! He was behind the sofa the whole time!

Fart Poopie's picture
j 1000+ points

I've never used the chewables. Knowing what you all have gone through, I'll stick to the liquid.

Anonymous Coward's picture

If you make a mistake and put concentrated green floor cleaner in your Waterpik instead of Lysterine, you get a intense dark greentounge first and then a black tongue for two weeks so far...

Relieved Pooper's picture

Well, for all of you Pepto Chewable peeps, the liquid turns everything black, too! I am sick right now and have been taking pepto to keep my meds from making me sick to my tummy. Talk about a fright! I felt like death warmed over then next thing I knew I had death looking results. I feel like a moron now! I even woke my boyfriend up to show him my black poo as well as my black mouth! BTW, TCBY has a blue rainbow flavor that will give you some cool poo.

Fart Poopie's picture
j 1000+ points

The liquid stuff does it too? I never really have to take more than two doses, so... how many doses of liquid pepto do you need to take before you get a black tongue?

Anonymous Coward's picture

Its the Pepto Bismol. Had it happen to me and scared the hell out of me!!

The Shit Volcano's picture
Comment Quality Moderatorh 3000+ points

I've never had the liquid stuff turn my mouth black or brown, but it does it to my poop every time. Weird shit!

I found Jesus! He was behind the sofa the whole time!

black poo king's picture

Guiness!!!!

Plenty of Guiness will turn the poo Black

Anonymous Coward's picture

This site has certainly helped me with the black tongue thing! I woke up this morning with a black/brown tongue! I DID take pepto bismal tablets last night, so that explains it~!

mott the poople's picture
l 100+ points

Dammit! Except for the pepto-black, my poop wont change. I'm jealous of the rainbow poop people. Tried MDPB, no luck. I wish my poop could look like that toothpaste aquaglint or whatever the hell that striped shit was called. Or better yet (if your old enough to remember)the rainbow glue you made balloons out of with a straw...buzzzzzzz(!)

Asphincter says WHAT...(!)

Anonymous Coward's picture

Common denominator: Pepto Bismal tablets before bed. That sure was a pleasant diagnosis.

Bowl Blaster's picture

Wow Pepto bismol sucks, does it give you bad breath too? I have this weird taste in my mouth and used mouthwash, brushed, everything and its still there.

The Shit Volcano's picture
Comment Quality Moderatorh 3000+ points

I have noticed this, too, Bowl Blaster. It kind of tastes like a sinus infection or something and it smells just as bad. All the more support for more natural remedies for poop problems.

I found Jesus! He was behind the sofa the whole time!

Black Poopster's picture

So if I'm not feeling ill - and my digestion seems normal, I took pepto maybe 3-4 days ago and my poop is black, and has been for about a week or so, should I go see a Doc.? I don't feel like theres something wrong, but on the back of all these otc meds. it says - notify your Doc. if your stool is black. Woulden't I feel an ulcer? What the heck else could be wrong? Is it serious?

Amy's picture

What a relief... I too woke up with a bad taste in my mouth and a black tounge. I thought it may have been dried blood, until I realized I too had taken two Pepto Bismol tablets last night for some stomach pain. I had done this before without getting a black tounge, does anyone know how many times you have to have taken it to get a black tounge?

Anonymous pooperer's picture

whew!!!! pooped black... thought i was dyeing.. nope just took to much pepto

Periodjuice's picture

I pooped blue once after I dyed my hair (Blue), it kind of creeped me out, but at the same time needed to remain in the bowl untill someone else could look at it, it was never photographed, which makes me sad.

Egotist's picture

The Bismuth Salycyliate breaks down in your digestive tract and the bismuth binds with the sulfur in your saliva. This bismuth sulfide is the black substance in your stool samples and mounth.

And it is completely harmless.

The Dumpster's picture
i 2000+ points

I KNOW I've got something wrong with my stomach: everything I eat turns to shit and just smells awful!

Anonymous Coward's picture

Thank you! this site saved me for trouble. I know the doctor just told me a couple of days ago that I ws stressed but I didn't think I was that stressed. So when I woke up this morning to a black tongue I had no ideal what it was until I came to this web site. Thanks

Anonymous Coward's picture

Thank you soooo much for this! I was freaking out cause my poop was black. A couple days ago I swallowed one of the pepto-bismal pills whole! Thank you!!

Anonymous Coward's picture

so chewable pepto bismol will turn you tounge black. the bismuth reacts with the sulfer in you saliva or gastric juices. dont worry, its a common side effect.

Tam's picture

one morning i woke up from being sick all night long...i had no idea what was ahead of me....i woke up and i was getting ready for school..I went to go brush my teeth and i was barely awake.. so i looked at myself in the mirror while i was brushing my teeth and my tounge was BLACK! I guess while researching "black tounge" with my curiousity I guess you can get black tounge from a chewable pepto i had taken right before bed...... that was the most twisted thing i have ever encountered

Anonymous Coward's picture

Just took a pepto this morning at 3 cuz I was feeling nauseous. I got up in the morning with the nasty pepto breath, and brushed my teeth, while I was rinsing the toothbrush, I saw that it was a purply/black, so I stuck out my tongue and sure enough-black as night, I managed to scrape most of it off, but I was worried for a minute. Later today, I had a bowel movement, and it was pretty dark too, so I found this site and am glad to know I am not alone!

Anonymous Coward's picture

WAS LOOKING FOR CAUSES OF BLACK TONGUE, AND FOUND THIS SITE---COULN'T STOP LAUGHING---MUST FORWARD. ANYWAY WE TOOK MY 86 YR. OLD MOTHER WITH DEMENTIA, TO HOSPITAL YESTERDAY. HER LIPS WERE SWOLLEN BEYOND BELIEF, AND HER TONGUE WAS BLACK. AND WHEN I SAY BLACK, I MEAN BLACK---THE WHOLE THING. NO ONE SEEMED TO BE ABLE TO FIGURE IT OUT, UNTIL I WAS WATCHING HER EAT HER SPAGHETTI THEY BROUGHT HER.I NOTICED THAT SHE HAD BLACK SQUIGGLY LINES DOWN HER ARM.I ASKED HER WHAT IT WAS, AND HOW THAT HAPPENED,AND SHE DID NOT KNOW. I KNEW.I ASKED HER IF SHE WAS WORKING CROSSWORD PUZZLES AGAIN, AND SHE SAID, YES, THAT I SHOULD KNOW SHE ALWAYS DOES.I ASKED HER IF SHE USED HER BLACK SHARPIE MARKER, AND SHE SAID,YES,I SHOULD KNOW, SHE ALWAYS DOES. AFTER SHE ATE, I CHECKED HER TONGUE AGAIN, AND IT SEEMED TO LIGHTEN UP A BIT (ACID FROM SAUCE IS A GOOD CLEANER)IT FINALLY HIT ME. THEN I ASKED, MOM, DID YOU PUT THAT SHARPIE MARKER IN YOUR MOUTH? SHE SAYS THAT SHE IS 4 YRS AWAY FROM 90, AND SHE KNOWS BETTER THAN TO STICK A MARKER IN HER MOUTH, BUT THERE IS NO OTHER EXPLAINATION FROM HOSPITAL OR OTHERWISE---NO PEPTO HERE---SO ALL YOU FOLKS WHO WAKE UP WITH BLACK TONGUES AND DON'T KNOW WHY---ARE YOU SURE YOU HAVEN'T BEEN SUCKING YOUR SHARPIE?

Fellow Black tongue's picture

I took a Pepto tablet last night before bed ... and this morning I awoke to a Black Tongue (also currently on antibiotics, something I've also read can cause it). On poop note: "BooBerry" cereal turned my poop green a while back.

Blue poo man's picture

I poop blue everyday...I love it!!! I show my friends and they call me the blue poo man group!

The secret is to eat a batch of Blueberries everymorning and drink it down with blue gatorade and then to top it off eat a spoonful of peatut butter...Instant Blue Poo for you!!!

-Blue poo man

The Big Wiper's picture
PoopReport of the Year AwardComment Quality Moderatori 2000+ points

Got to be the blue Gatorade that's doing it with the dye in it. I've eaten blueberries before and never had blue poo.

Pulling My Pants Down For Peace, Plop and Posterity!

Anonymous Coward's picture

I never knew the Pepto-Bismol chewable would turn your tongue black. You can imagine how freaked I was. I felt nauseous so I took the tablets and went to bed. I woke up about 3 a.m. and almost fainted. I had never seen anything like it. I think I'll stick to the liquid. Does it maybe cause a sore throat, too?

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