Why would I get a HUGE bruise after donating blood?
I have donated. Blood/platlets many times and I have never had a problem. I donated platelets last Weds. It hurt a lot more than usual,like pressure in my upper arm, the flabotamists said the needle was in right though. Afterwards it hurt so bad I couldn't use my arm all day. The next day I had a big purple bruise that didnt hurt but my arm was really tight. The bruise grew every day and now it's half way up the inner part of my upper arm and halfway down my forearm. The doctor said its ok as long as it doesn't hurt, it's just not too nice looking. Why might this happened?