A member asked:

Today i donated blood and the woman put the needle in my arm and it started swelling almost immediately. why did this happen?

A doctor has provided 1 answer
Dr. Donald Alves answered

Specializes in Emergency Medicine

Likely a leak...: The needle most likely went through the vein, not just into it, and blood started leaking out the back side of the vein. It is uncomfortable and makes a bruise, but is usually not serious. Will most often go away with warm compresses and elevation after a few days.

Answered 4/16/2016

3.9k views

Thank

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