you are probably having a reaction and need to go to your doctor asap. I have had 8 surgeries altogether and had the implant put in my arm. I have only had one surgery where it because red hot and really itchy, the little white lump, yeah that's probably a blister from the reaction, don't pik at it or it will make it worse, cover it with a 1x1 sterile pad and go to the doctor. hope this helps!