Blood in Stool: Is It a Sign of Colon Cancer or Hemorrhoids? - Surgery

Share to:

Blood in the stool?


Hello doctor, I have hemorrhoids and recently I've been experiencing some constipation.
My stools are hard and flat; two of them do not have any blood, but one has blood mixed with the stool.
I am concerned about the possibility of colon cancer.

Xiao Ming, 10~19 year old female. Ask Date: 2022/04/11

Dr. Zhang Shuhao reply Surgery


The risk of colorectal cancer increases with age, family history, and exposure to carcinogens.
If there is no significant family history, the likelihood of developing colorectal cancer before the age of 20 is extremely low.
When stools are harder, bleeding during bowel movements is mostly due to friction from anal fissures or hemorrhoids.
It is recommended to drink plenty of water, increase dietary fiber intake, and take warm sitz baths to alleviate symptoms.
If bleeding persists or there are ongoing concerns about colorectal lesions, a consultation for a digital rectal exam and colonoscopy can be done to rule out malignancy.

Reply Date: 2022/04/11

More Info


When it comes to blood in the stool, it can be a concerning symptom, and it's understandable to worry about serious conditions like colon cancer, especially if you have a family history of it. However, it's essential to consider various factors before jumping to conclusions.

From your description, you mention having hemorrhoids and experiencing constipation, which can lead to hard stools. Hard stools can cause trauma to the rectal mucosa during bowel movements, resulting in bleeding. This is often the case with hemorrhoids, which can bleed when they become engorged or irritated. The presence of blood mixed with stool, especially if it appears bright red, typically indicates that the source of bleeding is lower in the gastrointestinal tract, such as the rectum or anus, rather than from higher up in the colon.

Colon cancer can present with blood in the stool, but it usually comes with other symptoms such as changes in bowel habits (like persistent diarrhea or constipation), unexplained weight loss, abdominal pain, or a feeling that the bowel does not empty completely. In your case, since you have a history of hemorrhoids and are experiencing constipation, it is more likely that the bleeding is related to these issues rather than colon cancer.

However, it is crucial to monitor your symptoms closely. If the bleeding persists, increases in frequency, or if you notice any other concerning symptoms, it would be wise to consult a healthcare professional. They may recommend a colonoscopy, especially given your family history of colon cancer and your previous history of hemorrhoids. A colonoscopy can help visualize the colon and rectum, allowing for the identification of any abnormalities, including polyps or tumors.

In addition to the physical examination, a stool test for occult blood can also be performed. This test can detect hidden blood in the stool that may not be visible to the naked eye. If the test is positive, further investigation with a colonoscopy would be warranted.

Dietary factors can also play a role in bowel health. A diet low in fiber can contribute to constipation and hard stools, which can exacerbate hemorrhoids. Increasing your intake of fruits, vegetables, and whole grains can help improve stool consistency and reduce the risk of bleeding. Staying hydrated is equally important, as it helps soften the stool.

In summary, while blood in the stool can be alarming and may indicate serious conditions like colon cancer, in your case, it is more likely related to hemorrhoids and constipation. However, due to your family history and previous gastrointestinal issues, it is advisable to seek medical evaluation to rule out any serious conditions and to receive appropriate treatment for your hemorrhoids and constipation. Early detection and intervention are key to managing any potential health issues effectively.

Similar Q&A

How to Differentiate Blood in Stool: Hemorrhoids vs. Colon Cancer

Is there a way to distinguish whether the blood in the stool is due to hemorrhoids or possibly colon cancer? If the blood is bright red and mostly remains on the toilet paper (with none on the stool), does this indicate it is caused by hemorrhoids?


Dr. Chen Qifeng reply Gastroenterology and Hepatology
Hello: Generally speaking, if blood is separate from the stool, it may indicate bleeding from the anal area or near the rectum, which suggests a higher likelihood of hemorrhoids. However, anal cancer or rectal cancer near the anus cannot be completely ruled out. If blood is mixed...

[Read More] How to Differentiate Blood in Stool: Hemorrhoids vs. Colon Cancer


Understanding Blood in Stool: Is It a Sign of Colon Cancer?

Hello Doctor: I have been experiencing rectal bleeding for the past three days. The amount of blood is significant, turning the toilet water bright red. There is fresh red blood on the surface of my stool, and the toilet paper is also stained with bright red blood when I wipe. Co...


Dr. Chen Shidian reply Gastroenterology and Hepatology
Hello, sir. It is mostly internal hemorrhoids, which involve bleeding from the vascular tissue near the anal opening. Observation is sufficient, and there is no need for prolonged concern. Engage in moderate exercise, stay hydrated, and consume plenty of fruits and vegetables to ...

[Read More] Understanding Blood in Stool: Is It a Sign of Colon Cancer?


Understanding Symptoms: Is It Colon Cancer or Hemorrhoids?

In the past, there were a few instances of blood in the toilet after bowel movements, but now there is a small amount of bright red blood on the tissue after wiping, which has been happening for several months. There was one occasion when the bleeding was significantly more, and ...


Dr. Yang Zhichao reply Gastroenterology and Hepatology
Hello Mr. Anan, the symptoms of blood in your stool and changes in bowel habits are indications for scheduling a colonoscopy. We recommend that you visit the gastroenterology clinic to arrange for this examination. Changhua Hospital cares about your health.

[Read More] Understanding Symptoms: Is It Colon Cancer or Hemorrhoids?


Is It Hemorrhoids or Colon Cancer? Understanding Blood in Stool

I would like to ask the doctor about having blood in the stool. The toilet bowl does not have red blood, but there is blood when wiping. Could this be hemorrhoids or colorectal cancer?


Dr. Yu Mingchang reply Surgery
If you have a higher likelihood of hemorrhoids, it's advisable to consult a colorectal specialist.

[Read More] Is It Hemorrhoids or Colon Cancer? Understanding Blood in Stool


Related FAQ

Fecal Occult Blood

(Surgery)

Anal Bleeding

(Surgery)

Blood In Stool

(Gastroenterology and Hepatology)

Colorectal Cancer

(Surgery)

Rectal Bleeding

(Internal Medicine)

Internal Hemorrhoid Surgery

(Surgery)

Feces

(Surgery)

Hemorrhoids

(Gastroenterology and Hepatology)

Post-Hemorrhoid Surgery

(Surgery)

Anal Polyp

(Surgery)