Dark Red Substance in Stool: Causes and Concerns Explained - Gastroenterology and Hepatology

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There are dark red substances outside of the stool?


Hello doctor, this morning after using the restroom, I noticed a dark red piece floating in the toilet before flushing.
I used toilet paper to pick it up and when I pressed it, the paper became stained red (not dark red).
I'm not sure if it's blood; it doesn't seem like feces since it hasn't broken apart.
It feels more like food residue, but I didn't eat any red food yesterday (except for some red plums right before bed).
This has made me a bit anxious.
I have a history of indigestion, my stools have been softer, and I also have a somewhat severe case of hemorrhoids.
I'm wondering if this is related.
Could you please explain in detail? Thank you.

Mr. Wang, 30~39 year old female. Ask Date: 2015/02/17

Dr. Chen Qifeng reply Gastroenterology and Hepatology


Hello: There is a high possibility of bleeding from hemorrhoids, and you may consider visiting a colorectal surgery department.
Wishing you safety and good health.
Dr.
Chen Qi-Feng, Gastroenterology Department, Taoyuan Hospital, Ministry of Health and Welfare.

Reply Date: 2015/02/17

More Info


When you notice a dark red substance in your stool, it can understandably cause concern. There are several potential reasons for this occurrence, and understanding them can help alleviate your worries and guide you on the next steps to take.

First, it’s important to consider the possibility that the dark red substance could be related to food. Certain foods can cause changes in stool color. For instance, foods like beets, red cabbage, and even some fruits such as red plums or cherries can impart a reddish hue to your stool. In your case, you mentioned consuming red plums the night before, which could potentially explain the dark red substance you observed. However, if you did not consume any red foods, it may be less likely that the color change is food-related.

Another significant factor to consider is the presence of blood in the stool. Blood can appear in various forms, including bright red, dark red, or even black, depending on where it originates in the gastrointestinal tract. Dark red or maroon-colored blood typically suggests bleeding from the lower gastrointestinal tract, such as the colon or rectum. Given your history of hemorrhoids (internal hemorrhoids), it is possible that the dark red substance could be related to bleeding from these swollen veins, especially if you have been experiencing any straining during bowel movements or if your stools have been softer than usual.

In addition to hemorrhoids, other conditions could lead to the presence of blood or dark red substances in the stool. These include anal fissures, diverticulosis, or even more serious conditions like colorectal polyps or cancer, particularly if accompanied by other symptoms such as weight loss, changes in bowel habits, or abdominal pain. However, since you mentioned that you do not have abdominal pain or significant changes in your bowel habits, the likelihood of a serious condition may be lower.

Given your symptoms of digestive discomfort and the presence of soft stools, it is also worth considering that your digestive system may be reacting to stress or dietary changes. Stress can significantly impact gastrointestinal function, leading to symptoms like constipation or diarrhea, which can further complicate the situation.

In conclusion, while the dark red substance in your stool could be related to food, it is also essential to consider the possibility of bleeding, especially given your history of hemorrhoids. If the substance persists, changes in color, or if you experience any additional symptoms such as pain, significant changes in bowel habits, or weight loss, it is advisable to seek medical attention. A healthcare professional can perform a thorough evaluation, which may include a physical examination and possibly further diagnostic tests, to determine the exact cause of your symptoms and provide appropriate treatment.

In the meantime, maintaining a healthy diet rich in fiber, staying hydrated, and managing stress can help improve your digestive health. If you continue to experience digestive issues or notice any concerning changes, do not hesitate to reach out to a healthcare provider for further guidance. Your health and peace of mind are paramount.

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