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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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Does A Bruise Cause Effects On The Blood Test?

I had a bad bruise a couple days ago that caused me to have dark urine. This morning I am taking a normally scheduled blood test that I have been fasting for all night. Will the bruise (dark urine) cause this test to show weird (temporary) indications that may confuse my Doctor?
posted on Fri, 11 Apr 2014
Twitter Tue, 6 May 2014 Answered on
Twitter Tue, 6 May 2014 Last reviewed on
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General & Family Physician,  's  Response
Hello dear,
Bruise is unlikely to affect your blood test(you have not mentioned which test it is),though a large bruise can alter the values of bilirubin.
Thank you.
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Does A Bruise Cause Effects On The Blood Test?

Hello dear, Bruise is unlikely to affect your blood test(you have not mentioned which test it is),though a large bruise can alter the values of bilirubin. Thank you.