Could Blood After Bowel Movements Indicate Colon or Rectal Cancer?

Could this situation indicate colon cancer or rectal cancer?

I sometimes notice blood when I wipe after having a bowel movement.
This has been happening for about six months to a year, but it’s not very frequent—around three times.
There’s no pain, and the stool color seems normal.
I haven’t experienced significant weight loss or loss of appetite.
I’ve heard that colorectal cancer is not necessarily related to age, and I will be turning 19 in a few months.
Should I be concerned that this could be colorectal or rectal cancer? Is it serious enough that I need to go to the hospital for an examination, or should I just monitor the situation and see if it happens again? I’ve read that it could be due to dehydration and hard stools causing the bleeding.
I’m quite anxious about this...
it feels scary, and I’m also a bit afraid of the examination, like a colonoscopy.
Please help me, thank you!

Lisa, 10~19 year old female. Ask Date: 2010/06/25

Dr. Ke Fangxu reply Surgery

Hello Lisa, at the age of 18, rectal bleeding is generally not first suspected to be colorectal cancer, as the typical age group for colorectal cancer is over 50 years old.
While the probability of developing colorectal cancer at this age is not zero, it is indeed low to the point of being remarkable.
Typically, this type of bleeding is caused by hemorrhoids.
If there are no further episodes of bleeding, it is advisable to continue monitoring the situation.
However, if bleeding recurs or if there are other uncomfortable symptoms, further examination is recommended.
Colorectal cancer does not have specific symptoms, but if you are truly concerned, you can go to a hospital for a colonoscopy.
Generally, for patients of this age, a colonoscopy is not scheduled unless there are significant symptoms or multiple family members have been diagnosed with colorectal cancer.

Reply Date: 2010/06/25

More Info

Blood after bowel movements can indeed be concerning, especially for someone who is aware of the potential risks associated with colon and rectal cancer. However, it's important to understand that not all instances of blood in the stool are indicative of cancer, particularly in younger individuals like yourself.
In your case, you mentioned that the blood is not a frequent occurrence and that your bowel movements appear normal otherwise. This is a positive sign, as many benign conditions can cause blood in the stool, such as hemorrhoids, anal fissures, or even minor trauma during bowel movements. Hemorrhoids, for instance, are swollen blood vessels in the rectal area that can bleed, especially if you are experiencing constipation or straining during bowel movements.
You also noted that you might not be drinking enough water, which can lead to harder stools and increased straining, potentially resulting in bleeding. Staying well-hydrated and maintaining a diet rich in fiber can help prevent constipation and reduce the likelihood of straining during bowel movements.
While your age (19 years) is generally not associated with a high risk of colon or rectal cancer, it is crucial to remain vigilant about any changes in your bowel habits or the presence of blood. The fact that you have not experienced other symptoms such as significant weight loss, changes in appetite, or persistent abdominal pain is reassuring.
However, it is still advisable to consult a healthcare professional if you continue to notice blood in your stool, even if it is infrequent. A doctor can perform a thorough evaluation, which may include a physical examination and possibly a referral for a colonoscopy if deemed necessary. A colonoscopy is a safe and effective procedure that allows for direct visualization of the colon and rectum, helping to identify any abnormalities.

In summary, while blood after bowel movements can be alarming, it does not automatically indicate colon or rectal cancer, especially in your case. It is essential to monitor your symptoms and consult with a healthcare provider for a proper assessment. They can help determine the cause of the bleeding and recommend appropriate management strategies. Remember, early detection and intervention are key to addressing any potential health issues, so don't hesitate to seek medical advice if you have concerns.

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