I donated blood five years ago and believe I got nerve damage in my arm from it. After donating, my arm hurt for many months and every now and then the pain would come back. For the past week, I have had dull pain in that same arm, starting from the middle and going down towards my hand. I work on my computer frequently so it is possible it is related to that, but I do not have any pain in my left arm. I also have had Lyme Disease in the past, but I have not had any symptoms from that in around 10 years. Please advise on how I can help manage this pain and if it could still be from that initial nerve damage.