Mucus in Stool: When to Worry About Blood and Symptoms - Gastroenterology and Hepatology

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Mucus in stool


Hello Doctor, this morning after having a bowel movement, while squatting to tidy up, I suddenly felt a warm sensation.
When I went to the bathroom, I noticed yellow mucus with blood streaks, and my stool also had slight traces of blood.
However, there were no obvious blood stains when wiping.
I have experienced similar symptoms recently.
I have a minor issue with external hemorrhoids and had a colonoscopy three years ago, which showed no abnormalities and no polyps.
This year, my stool occult blood test was normal.
Should I be concerned that this is just related to the external hemorrhoids, or do I need to undergo another colonoscopy screening?

Ms. Wu, 40~49 year old female. Ask Date: 2024/01/02

Dr. Lin Minghui reply Gastroenterology and Hepatology


There is yellow mucus with blood present, but there are no obvious blood stains upon wiping, which does not seem to indicate an external hemorrhoid issue.
There are symptoms suggestive of colitis.
A stool test can be conducted to check for abnormalities.
If this occurs frequently and the cause remains unclear, a colonoscopy can be arranged to clarify the reason.
Wishing you good health!

Reply Date: 2024/01/02

More Info


When it comes to understanding mucus in stool, especially when accompanied by blood, it is essential to approach the situation with caution and awareness of potential underlying conditions. The symptoms you describe—yellow mucus with blood streaks and slightly bloody stool—can be concerning and warrant further investigation.

Firstly, the presence of mucus in stool can be a normal occurrence, as mucus is produced by the intestines to help lubricate the passage of stool. However, when it is accompanied by blood, it raises the possibility of an underlying issue that may require medical attention. The blood in your stool, even if it is not significant, can indicate several conditions ranging from benign to more serious.

Given your history of a normal colonoscopy three years ago and a negative fecal occult blood test this year, it is reassuring that there have been no previous indications of significant pathology. However, the recurrence of these symptoms suggests that it may be prudent to consult with a healthcare provider again. Conditions such as hemorrhoids, anal fissures, or even inflammatory bowel disease (IBD) could be contributing factors to your symptoms. Hemorrhoids, for instance, can cause blood on the toilet paper or in the stool, especially if there is straining during bowel movements. Anal fissures can also lead to pain and bleeding during or after bowel movements.

While your previous colonoscopy did not show any abnormalities, it is important to note that new symptoms can arise over time. If you are experiencing recurrent symptoms, it may be wise to consider a follow-up colonoscopy, particularly if you have risk factors for colorectal cancer or if there is a family history of gastrointestinal diseases. Additionally, if you notice any changes in your bowel habits, such as increased frequency, diarrhea, or constipation, or if you experience significant abdominal pain, weight loss, or fatigue, these would be red flags that necessitate further evaluation.

In terms of the yellow mucus, it could be related to dietary factors, infections, or gastrointestinal conditions such as irritable bowel syndrome (IBS) or IBD. Stress and dietary changes can also lead to increased mucus production. If the mucus is persistent or if you develop other symptoms such as fever, severe abdominal pain, or changes in appetite, it is crucial to seek medical attention promptly.

In summary, while your previous screenings have been normal, the recurrence of mucus and blood in your stool should not be ignored. It is advisable to consult with a healthcare professional who can perform a thorough evaluation, which may include a physical examination, a review of your medical history, and possibly repeat diagnostic tests such as a colonoscopy or imaging studies. Early detection and intervention are key to managing any potential gastrointestinal issues effectively. Always prioritize your health and do not hesitate to seek medical advice when you have concerns about your symptoms.

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