I had nerve damage from a blood donation once, same symptoms. Every time I lifted my arm above my waist it would tingle for 4 months!!! I also had a bad experience when my roomie in college gave blood. She was looking at me, I was looking at her blood draw, the lady stuck the needle in then blood squirted out of her arm and hit the lady... I tried really hard to not look horrified, but i failed, then my roomie looked and flipped out for a bit. anyway, no more blood giving for me, not at the red cross mobiles.