Depends on Gender: If you are a man, almost impossible. If you are a woman, a tiny drop of blood from your anus could contaminate a urine sample taken to look for blood. To be sure that this doesn't happen, consider coving your anus with a small wad of toilet paper after carefully cleansing your bottom, vagina, and then the urethra (urine opening). Good luck!
Answered 5/7/2018
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3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
8 doctors weighed in across 2 answers
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