Blood in Stool: Causes and Concerns for Your Health - Gastroenterology and Hepatology

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Hello, doctor: I would like to ask...
A few days ago, I experienced diarrhea and noticed blood in my stool (bright red blood mixed with the stool).
This has occurred one to two times in the past few days, with a small amount mixed in.
I had a colon polyp removed two years ago.
Could this be a sign of colon cancer? Thank you!

nicy, 20~29 year old female. Ask Date: 2003/07/29

Dr. Cai Junyan reply Gastroenterology and Hepatology


Hello Nicy: Blood in the stool can be caused by hemorrhoidal bleeding, polyps, colorectal cancer, or inflammatory bowel diseases, among others.
It is best to promptly consult a qualified gastroenterologist for a complete colonoscopy.
Gastroenterology Specialist, Dr.
Tsai Jun-Yan.

Reply Date: 2003/07/29

More Info


When it comes to the presence of blood in stool, particularly fresh red blood, it is essential to approach the situation with caution and seek medical evaluation. The fact that you have experienced this symptom multiple times, especially given your history of colon polyps, raises valid concerns that should not be overlooked.

Fresh red blood in the stool typically indicates that the bleeding is occurring in the lower gastrointestinal tract, which includes the colon and rectum. There are several potential causes for this symptom, and understanding them can help guide your next steps.

1. Hemorrhoids: One of the most common causes of bright red blood in the stool is hemorrhoids. These are swollen veins in the rectum or anus that can bleed during bowel movements. If the blood is bright red and appears on the toilet paper or in the toilet bowl, hemorrhoids could be a likely culprit.

2. Anal Fissures: These are small tears in the lining of the anus, often caused by passing hard stools. They can also lead to bright red blood and are usually accompanied by pain during bowel movements.

3. Diverticular Disease: Diverticulosis, which involves the formation of small pouches in the colon wall, can lead to diverticulitis if these pouches become inflamed or infected. This condition can also cause bleeding.

4. Colorectal Polyps or Cancer: Given your history of having had colon polyps removed, it is crucial to consider the possibility of new polyps or even colorectal cancer. While not all polyps are cancerous, some can develop into cancer over time. The risk increases with age and with a history of polyps.

5. Gastrointestinal Infections: Certain infections can cause inflammation and bleeding in the intestines, leading to blood in the stool. This is often accompanied by other symptoms such as diarrhea, abdominal pain, and fever.

6. Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease and ulcerative colitis can cause inflammation in the gastrointestinal tract, leading to symptoms such as blood in the stool, diarrhea, and abdominal pain.

Given your previous history of colon polyps, it is advisable to consult with a healthcare provider as soon as possible. They may recommend a colonoscopy to evaluate the current state of your colon and to rule out any serious conditions such as colorectal cancer. During a colonoscopy, the doctor can visually inspect the lining of the colon and rectum and take biopsies if necessary.

In the meantime, keep track of any additional symptoms you may experience, such as changes in bowel habits, abdominal pain, weight loss, or changes in appetite. These details can provide valuable information to your healthcare provider.

In summary, while there are several potential causes for blood in the stool, your history of colon polyps necessitates a thorough evaluation to rule out any serious conditions. Prompt medical attention is essential to ensure your health and peace of mind.

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