I am a 38 year old female, 195 lbs.  I gave a blood donation Tuesday night from my right arm.  Wed. morning I woke up with a sore sport slightly up on my right wrist.  It is hard to the touch. Did not hit or bruise that area and did not see any bite marks.  Two days later and bump is still there.  It seems a little more tender and it now looks a little red and is warm to the touch.  Ive never had problems donating before and maybe that is just a coincidence?  Should I be concerned?
Hi, From your description it would appear that you have a localized infection. This may need either topical antibiotic cream or oral antibiotics. I suggest you see your doctor for examination of the area and further advice. Regards.