Get your health question answered instantly from our pool of 18000+ doctors from over 80 specialties

166 Doctors Online
Doctor Image
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

I will be looking into your question and guiding you through the process. Please write your question below.

What causes greenish black stools?

Answered by
Dr.
Dr. Bonnie Berger-Durnbaugh

General & Family Physician

Practicing since :1991

Answered : 2850 Questions

default
Posted on Fri, 4 May 2018 in Digestion and Bowels
Question: Recently I have noticed that my stools are very dark - greenish black. Does this mean something bad?
doctor
Answered by Dr. Bonnie Berger-Durnbaugh 1 hour later
Brief Answer:
Information

Detailed Answer:
Hello Mr. XXXX,

If your stools are black and tarry appearing, then this can represent bleeding from the upper gastrointestinal tract (stomach or esophagus). This is because stomach acid changes blood to a black tarry appearance.

Pepto Bismol can also cause black appearing stools.

A greenish color can be from foods that have green in them such as green leafy vegetables (for example, kale), foods with green food coloring in them, and some herbal supplements.

It can also be freon a fast transit time through the intestines which doesn't allow enough time for bile salts from the gall bladder to be broken down. Bile acid/bile salts have a greenish color. If this is what is happening, usually there are other symptoms to go with it such as a shorter time from eating to having a BM, or loose stools.

You ask if it is something bad: If it is mostly black and tarry, then do go in to be seen now, as it can be stomach bleeding. If it is diarrheal, talk with your doctor about the color associated with this as it can be related to an infection in your digestive tract.

I hope this gives you enough information for how to proceed. Please let me know if I can provide further information or clarification.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
premium_optimized

The User accepted the expert's answer

Share on
Question is related to
Medical Topics ,  

Recent questions on  Gall bladder

doctor1 MD

I HAVE TINGLING PAIN IN MY RIGHT SIDE BELOW THE RIB CAGE . BUT ONLY WHEN I SIT IT GOING COMPLETELY AWAY WHEN I LAY DOWN?

doctor1 MD

I have pain in my upper right hand side of my chest, feel sick after eating, and get really hungry, and thirsty. Could this indicate esophageal cancer or gallbladder problems?

doctor1 MD

Mom 86 has stomach pain on the right side. No fever , but nauseated.

doctor1 MD

my mother has tested a usg whole abdomen in this report UTERES - is showing a small well defined hypoechoeic in anterior wall and few small nabothian cysts are seen in cervixLIVER-showing mild fatty infiltrations .GALL BLADDER- is distended and is showing multiple echogenic lesions with posterior acoustic shadowing s/o gb caculi...i want to know what is this problem?