Depends: After a blood draw, if there is slight bleeding underneath the skin, this creates the bruise. If enough pressure is placed after a blood draw, there should not be much bruising. If it is a small bruise, there should be no reason for alarm. It usually resolves within a week. If the bruise is large (extends farther from the are of the blood draw) and causes pain, seek medical attention.
Answered 3/10/2013
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2 doctors weighed in across 2 answers
A doctor has provided 1 answer
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