Dark Red Blood in Stool: Causes and Concerns - Surgery

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Rectal bleeding


Hello doctor, a couple of days ago I noticed blood streaks and clots when wiping after a bowel movement.
I would like to know if there is an issue with my gastrointestinal tract.
The color of the blood is dark red.

Ms. Chen, 20~29 year old female. Ask Date: 2017/09/02

Dr. Li Zhonghuai reply Surgery


Hello! It is recommended to see a colorectal surgeon for an anoscopy and colonoscopy.
Take care! Changhua Hospital cares about you!

Reply Date: 2017/09/02

More Info


When you notice dark red blood in your stool, it can understandably cause concern. The color and consistency of the blood can provide important clues about its source and potential underlying issues. Dark red blood typically indicates that the bleeding is occurring from a source that is higher up in the gastrointestinal tract, such as the colon or rectum, rather than from the anus itself, which would usually present as bright red blood.

One of the most common causes of dark red blood in the stool is hemorrhoids, which are swollen veins in the lower rectum or anus. They can cause bleeding, especially during bowel movements, and the blood may appear dark red if it has been in contact with the stool for a longer period. Other potential causes include anal fissures, diverticular disease, or even more serious conditions such as colorectal polyps or cancer.

In your case, since you mentioned the presence of blood clots and dark red blood, it is essential to consider a few factors. First, evaluate any accompanying symptoms you may have, such as abdominal pain, changes in bowel habits, weight loss, or fatigue. These symptoms can help differentiate between benign conditions and more serious issues.

Dietary factors can also play a role in the appearance of your stool. Certain foods, particularly those high in iron or red pigments (like beets), can cause stool to appear darker. However, if you have not made significant dietary changes recently, it is crucial to investigate further.

Given your symptoms, it is advisable to consult a healthcare professional for a thorough evaluation. A doctor may recommend a physical examination, laboratory tests, and possibly imaging studies or a colonoscopy to determine the exact cause of the bleeding. A colonoscopy is particularly important if you are over the age of 50 or have a family history of colorectal cancer, as it allows for direct visualization of the colon and rectum and can help identify any abnormal growths or lesions.

In the meantime, to manage your symptoms, you should focus on maintaining a healthy diet rich in fiber to prevent constipation, which can exacerbate hemorrhoids and fissures. Staying hydrated is also essential. If you experience significant pain or if the bleeding persists, do not hesitate to seek immediate medical attention.

In summary, while dark red blood in the stool can often be attributed to less serious conditions like hemorrhoids, it is crucial to take it seriously and seek medical advice to rule out any significant gastrointestinal issues. Early detection and treatment can lead to better outcomes, so do not delay in addressing your concerns with a healthcare provider.

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