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A member asked:
Why does the skin on your arm around the area blood is taken from bruise after a blood test?
A doctor has provided 1 answer
Bruise: The blood vessel is punctured when blood is withdrawn during a blood test. If the vessel is not compressed long enough, blood will leak out of the vessel giving a bruise. Holding direct pressure with a cotton ball for 10 or 15 minutes is usually enough. However if a person is on platlet inhibitors such as asprin longer might be necessary.
Answered 5/6/2019
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