Hi I got blood taken around 3 weeks ago. A few days after I experienced swelling, bruising and a constant pulsing sensation in the arm area where I had blood taken. This then developed in to to pins and needles and numbness from elbo down to hand. It caused naseua and dizzyness and I fainted. My doc said I had low bp. My symptoms eased and I was feeling back to normal. However, a few days ago, my arm has started pulsing again, I have slight swelling and hardening in my arm. My arm feels sore from shoulder down (like pulled muscle pain) and occassional pins and needles with dizzyness. Advice appreciated. Thanks