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How to treat rectal bleeding post-chemotherapy in colon CA?

This Premium Q&A, reviewed and published, features a real conversation between an iCliniq user and a physician.

Patient's Query

Hi doctor,

My father is 64 years old. His weight is 52 kg. One week back, he underwent surgery and first chemotherapy for transverse colon cancer third stage. After chemotherapy, he is passing blood in the stool. Why is it so?

Please help.

Hi,

Welcome to icliniq.com.

As he is post-operative, blood in the stool can occur because of fresh surgery. Consult the surgeon who operated on him and, if possible, do a colonoscopy to look at the origin of bleeding. If it is a minor bleed, they will cauterize it during a colonoscopy itself. If it is a significant bleed, re-surgery can be needed. Chemotherapy can be continued if there is no major bleed on colonoscopy. Please attach all the scan reports to take a look at the condition.

I hope this helps.

Thank you.

Patient's Query

Hi doctor,

The surgery was done two months before, after which there was no bleeding. My father underwent chemotherapy one week before, after which he had blood in his stool.

Hi,

Welcome back to icliniq.com.

Chemotherapy will not cause blood in the stools. It causes mucositis, but that will not cause blood in the stools. So I suggest your father do a colonoscopy to find the exact cause of bleeding.

I hope this helps.

Please feel free to reach out in case of further queries.

Thank you.

Medically reviewed byiCliniq medical review team

Published At May 5, 2021
Reviewed AtDecember 10, 2025

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