Rectal Bleeding: When to Seek Medical Attention - Surgery

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Major bleeding


Hello Dr.
Ke, since the second half of last year, my bowel movements have been somewhat like diarrhea, so I underwent a colonoscopy, which showed no issues.
After that, my stools have been occasionally ribbon-like and sometimes watery.
This morning, I suddenly had watery stools again with some blood, and I'm a bit worried...

Ani, 20~29 year old female. Ask Date: 2015/07/14

Dr. Xu Kaixi reply Surgery


If you have undergone a colonoscopy and found no issues, it has preliminarily ruled out organic colorectal diseases (such as colorectal tumors).
In this case, gastrointestinal dysfunction or bleeding should be considered as functional bowel disorders.
It is recommended that you consult a gastroenterologist for further evaluation and medication treatment.

Reply Date: 2015/07/14

More Info


Rectal bleeding can be a concerning symptom, and it is important to understand when to seek medical attention. Given your history of experiencing changes in bowel movements, including occasional watery stools and the recent occurrence of blood, it is advisable to take this situation seriously.

Firstly, it is essential to recognize that rectal bleeding can arise from various causes, ranging from benign to serious conditions. Common causes include hemorrhoids, anal fissures, diverticular disease, inflammatory bowel disease (IBD), and colorectal cancer. Since you have already undergone a colonoscopy that did not reveal any issues, it is less likely that a serious condition was present at that time. However, new symptoms, especially the presence of blood, warrant further evaluation.

In your case, the fact that you have experienced watery stools along with blood could indicate several possibilities. Hemorrhoids and anal fissures are common causes of rectal bleeding, especially if there is straining during bowel movements. However, the presence of blood in watery stools could also suggest other gastrointestinal issues, such as infections, inflammatory bowel disease, or even more serious conditions like colorectal cancer, particularly if there are changes in bowel habits.

Here are some guidelines on when to seek medical attention for rectal bleeding:
1. Amount of Blood: If you notice a significant amount of blood, such as a large volume in the toilet or persistent bleeding, you should seek immediate medical attention.

2. Accompanying Symptoms: If the bleeding is accompanied by severe abdominal pain, fever, dizziness, or fainting, these could be signs of a more serious condition requiring urgent care.

3. Duration of Symptoms: If the bleeding persists or recurs over several days, it is important to consult a healthcare provider for further evaluation.

4. Changes in Bowel Habits: If you experience significant changes in your bowel habits, such as persistent diarrhea, constipation, or changes in the consistency of your stool, it is advisable to seek medical advice.

5. History of Gastrointestinal Issues: Given your previous colonoscopy and ongoing symptoms, it is prudent to follow up with your healthcare provider to discuss your current symptoms and any necessary further investigations.

In conclusion, while some causes of rectal bleeding may be benign, the presence of blood in your stool, especially when accompanied by changes in bowel habits, should not be ignored. It is crucial to consult with a healthcare professional who can perform a thorough evaluation, which may include repeat imaging or additional tests, to determine the underlying cause and appropriate treatment. Early intervention can help prevent complications and ensure better health outcomes.

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