Is Dark Brown Stool After Gastroscopy Normal? What to Watch For

After undergoing an upper gastrointestinal endoscopy, passing dark-colored stools the following day?

Hello, doctor.
I would like to ask you about something.
After undergoing an upper gastrointestinal endoscopy yesterday morning, I passed dark brown stool this afternoon, which is different from my usual light brownish-yellow stool.
It doesn't resemble tarry stool, but the color is somewhat dark.
The stool on the toilet paper appears dark brown.
Is this situation normal? Should I monitor it for a few more days, or should I return for a follow-up appointment directly?

Kimi, 40~49 year old female. Ask Date: 2022/02/23

Dr. Cai Anshun reply Gastroenterology and Hepatology

Hello, as long as you do not have black stools or brick-red colored stools, Changhua Hospital cares about your health.
Dr.
Tsai An-shun.

Reply Date: 2022/02/23

More Info

After undergoing a gastroscopy, it is not uncommon to notice changes in stool color, including dark brown stool. This can be attributed to several factors, including the medications used during the procedure, dietary changes, or even the presence of blood in the gastrointestinal tract.
In your case, the deep brown color of your stool, while not typical of the usual yellow-brown shade, does not immediately indicate a serious problem, especially if it does not resemble tarry black stools, which are often associated with upper gastrointestinal bleeding. However, it is essential to monitor your symptoms closely.

Here are some key points to consider:
1. Post-Procedure Effects: After a gastroscopy, some patients may experience changes in bowel habits or stool color due to sedation, medications (like iron supplements or bismuth compounds), or even the food consumed post-procedure. If you were given any medications that could affect your stool color, this might explain the change.

2. Dietary Factors: Consider any recent dietary changes. Foods that are dark in color, such as beets, black licorice, or certain supplements, can also lead to darker stools. If you have consumed any of these, it may be a benign cause.

3. Signs of Concern: While dark brown stool can be normal, you should watch for additional symptoms that may indicate a more serious issue. These include:
- Persistent dark or black stools that resemble tar (indicative of potential bleeding).

- Abdominal pain, especially if it is severe or persistent.

- Nausea or vomiting, particularly if there is blood in the vomit.

- Changes in your overall health, such as weakness or fatigue.

4. When to Seek Medical Attention: If your stool remains dark brown for more than a couple of days, or if you develop any concerning symptoms as mentioned above, it is advisable to return to your healthcare provider for further evaluation. They may recommend additional tests, such as a stool test or imaging studies, to rule out any underlying issues.

5. Follow-Up Care: If your symptoms are mild and you do not have any alarming signs, you may choose to monitor your stool color for a few days. Keeping a record of any changes, along with any accompanying symptoms, can be helpful for your healthcare provider if you need to follow up.

In conclusion, while dark brown stool after a gastroscopy can be normal, it is essential to remain vigilant and aware of your body’s signals. If you have any doubts or if your condition changes, do not hesitate to seek medical advice. Your health and peace of mind are paramount.

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