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Would Menstruation Cause Occult Blood?

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Posted on Tue, 11 Sep 2018
Twitter Tue, 11 Sep 2018 Answered on
Twitter Tue, 19 Apr 2022 Last reviewed on
Question : I had blood work and urine sample done while I had a heavy period. The urine result came back showing 2t occult blood with everything else being normal in the urine sample. Would menstruation cause occult blood? Thank you so much!
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Answered by Dr. Anders Mark Christensen (13 minutes later)
Brief Answer:
Yes, most likely.

Detailed Answer:

Hi,

Menstrual bleeding is a common cause for a 'false positive' urine test that shows occult blood.

If you have no other symptoms from your urinary system (e.g. pain in flank, inguinal regions, suprapubic, etc.), the reason for the occult blood is from your menstrual bleed.

You can test this yourself by doing another urine test some days after your period has stopped.

Hope this helps. Feel free to ask further.
Above answer was peer-reviewed by : Dr. Arnab Banerjee
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Answered by
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Dr. Anders Mark Christensen

General Surgeon

Practicing since :2016

Answered : 1556 Questions

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Would Menstruation Cause Occult Blood?

Brief Answer: Yes, most likely. Detailed Answer: Hi, Menstrual bleeding is a common cause for a 'false positive' urine test that shows occult blood. If you have no other symptoms from your urinary system (e.g. pain in flank, inguinal regions, suprapubic, etc.), the reason for the occult blood is from your menstrual bleed. You can test this yourself by doing another urine test some days after your period has stopped. Hope this helps. Feel free to ask further.