Coffee-Colored Stool: Potential Causes and Concerns - Surgery

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There is coffee ground-like red discoloration in the stool?


Hello doctor, today after using the restroom, I noticed that my stool had a coffee-colored tint and there was a slight reddish liquid (though it didn't seem quite like deep red).
The appearance of my stool and the color when wiping were normal today.
I would like to ask if this could be a sign of colorectal bleeding or a tumor? I haven't eaten any foods with red pigments in the past few days, only a spicy burger yesterday.
Additionally, I've been feeling a bit dizzy when standing up after lying down, which seems like orthostatic hypotension.
Previously, I had orange-red liquid, and the doctor at that time thought it was due to food coloring (I had eaten pumpkin).
Today, my stool was somewhat thin, but in the past few days, I had passed thicker stools that were normal in color (and it was easy to wipe clean).
Three years ago, I had a colonoscopy that was normal, with only hemorrhoids and irritable bowel syndrome.
Thank you, doctor.

Niming, 20~29 year old female. Ask Date: 2021/10/09

Dr. Chen Jiaming reply Surgery


It is not possible to provide a diagnosis based solely on your description; it is advisable to seek an in-person consultation for further examination.

Reply Date: 2021/10/09

More Info


Understanding coffee-colored stool can be concerning, especially when accompanied by other symptoms such as a slight red tint in the water. It's essential to approach this situation with a clear understanding of potential causes and when to seek medical attention.

Firstly, coffee-colored stool can arise from various factors. One of the most common causes is the presence of digested blood in the stool, which can indicate bleeding in the upper gastrointestinal tract. This could be due to conditions such as gastric ulcers, esophageal varices, or even malignancies. However, the fact that your stool appears normal and that you have not consumed any foods with red pigments recently is a positive sign.

The presence of a slight red tint in the water could suggest a few possibilities. It might be related to minor bleeding from hemorrhoids, especially since you mentioned having a history of hemorrhoids. Hemorrhoids can cause bright red blood to appear in the stool or on toilet paper, but this typically does not result in coffee-colored stool. If the bleeding is minor and intermittent, it may not be a cause for alarm, but it should still be monitored.

Your recent experience of dizziness upon standing could indicate orthostatic hypotension, which is a drop in blood pressure when changing positions. This can occur due to dehydration, prolonged bed rest, or other underlying conditions. If you are experiencing dizziness frequently, it is crucial to stay hydrated and consider discussing this with a healthcare provider.

Given your history of irritable bowel syndrome (IBS) and the normal colonoscopy three years ago, it is less likely that you are dealing with a significant structural issue in your colon. IBS can cause changes in bowel habits and stool consistency, which might explain the variations in your stool appearance. Stress and dietary changes can also exacerbate IBS symptoms, leading to fluctuations in bowel movements.

In summary, while coffee-colored stool can indicate serious conditions, your overall presentation suggests that it may not be an immediate cause for concern, especially if you are not experiencing significant pain or other alarming symptoms. However, it is essential to monitor your symptoms closely. If you notice persistent changes in your stool color, experience significant abdominal pain, or if the dizziness worsens, it would be prudent to seek medical evaluation.
In the meantime, consider keeping a food diary to track any potential dietary triggers that may be affecting your bowel movements. Staying hydrated, maintaining a balanced diet, and managing stress can also help alleviate some of the symptoms associated with IBS and improve your overall gastrointestinal health. If symptoms persist or worsen, do not hesitate to consult with a healthcare professional for further evaluation and management.

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