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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes A Black Residue Along With Mucus In Stool?

I pay attention to my stool regularly and Noticed black chunkThat looked like a rock I took it out and it’s not hard really I’m not that soft but I’m pretty sure it’s not a rock I also noticed possible mucus as well please help me figure out what this is
Tue, 23 May 2023
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Internal Medicine Specialist 's  Response
Hi,

The presence of black chunks in your stool, along with possible mucus, could indicate a few possible causes, including:
1. Blood: The black chunks may actually be old, dried blood, which can be a sign of bleeding in the upper gastrointestinal tract. If this is the case, it is important to seek medical attention immediately.
2. Medications or supplements: Certain medications or supplements, such as iron supplements or bismuth-containing medications, can cause the stool to turn black.
3. Food: Certain foods, like blueberries or black licorice, can also cause the stool to turn black.

It is important to make an appointment with your healthcare provider to investigate the cause of the black chunks in your stool. Your healthcare provider may recommend further testing, such as a fecal occult blood test, or a colonoscopy.

Take care. Hope I have answered your question. Let me know if I can assist you further.

Regards,
Dr. Diwashish Biswas, Internal Medicine Specialist
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What Causes A Black Residue Along With Mucus In Stool?

Hi, The presence of black chunks in your stool, along with possible mucus, could indicate a few possible causes, including: 1. Blood: The black chunks may actually be old, dried blood, which can be a sign of bleeding in the upper gastrointestinal tract. If this is the case, it is important to seek medical attention immediately. 2. Medications or supplements: Certain medications or supplements, such as iron supplements or bismuth-containing medications, can cause the stool to turn black. 3. Food: Certain foods, like blueberries or black licorice, can also cause the stool to turn black. It is important to make an appointment with your healthcare provider to investigate the cause of the black chunks in your stool. Your healthcare provider may recommend further testing, such as a fecal occult blood test, or a colonoscopy. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Diwashish Biswas, Internal Medicine Specialist