Dark Red Stool: Causes and When to Seek Help - Surgery

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Dark red stool?


I am a student and I don't eat fruits very often, so I've been experiencing constipation for one to two months.
In recent months, I've noticed that the color of my stool is dark red, and there is a white, mucus-like substance.
My bowel movements don't feel completely clean, and I still feel like there's something left in my rectum, but I haven't lost any weight.
Additionally, I've noticed that sometimes when my stool falls into the water, there are red substances floating out.
Is there something wrong?

Wang Tongxue, 10~19 year old female. Ask Date: 2024/03/18

Dr. Chen Bingze reply Surgery


Hello, it is recommended that you undergo a stool examination or have a physician prescribe some medications to promote bowel movements.
If necessary, the physician may suggest a colonoscopy.

Reply Date: 2024/03/18

More Info


Understanding dark red stool can be concerning, especially when accompanied by other symptoms like mucus and a sensation of incomplete evacuation. Given your situation, it’s essential to consider various factors that could contribute to these changes in your bowel movements.

Firstly, the dark red color of your stool may indicate several potential issues. One common cause is bleeding in the lower gastrointestinal tract, which can occur due to conditions such as hemorrhoids, anal fissures, or inflammatory bowel diseases (IBD) like Crohn's disease or ulcerative colitis. Hemorrhoids, in particular, can cause bright red blood to appear in the stool or on toilet paper, while more significant bleeding can lead to darker stools. The presence of mucus can also suggest inflammation or irritation in the intestines, which is often seen in IBD.

The sensation of incomplete evacuation and the presence of white mucus could indicate that your bowel movements are not fully clearing the rectum, which can be a sign of constipation or a blockage. Since you mentioned that you have been experiencing constipation for one to two months, this could be contributing to the issues you are facing. Chronic constipation can lead to the formation of hard stools, which may cause straining and result in small tears or fissures, leading to bleeding.

The observation of red-colored substances floating in the toilet water could be concerning. This could be due to undigested food, blood, or even a reaction to certain foods you’ve consumed. It’s important to note that some foods, particularly those high in pigments (like beets), can cause stool to appear reddish. However, if you have not eaten such foods recently, it could be indicative of bleeding.

Given your symptoms, it is advisable to seek medical attention. A healthcare provider can perform a thorough evaluation, which may include a physical examination and possibly diagnostic tests such as a stool test, colonoscopy, or imaging studies to determine the underlying cause of your symptoms. It’s crucial to rule out any serious conditions, especially if there is any indication of gastrointestinal bleeding.

In the meantime, consider making dietary changes to help alleviate your constipation. Increasing your intake of fruits, vegetables, and whole grains can provide the necessary fiber to promote regular bowel movements. Staying hydrated is also essential, as adequate fluid intake can help soften stools and ease their passage. If you find it challenging to incorporate these changes, over-the-counter fiber supplements or stool softeners may provide temporary relief, but it’s best to consult with a healthcare professional before starting any new medications.

In summary, while dark red stool can be caused by various factors, including dietary choices and potential gastrointestinal issues, it’s essential to take your symptoms seriously. Seeking medical advice will help ensure that any underlying conditions are addressed promptly and appropriately. Remember, your health is paramount, and early intervention can lead to better outcomes.

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