Cause For Itching And Bumpy Rash On The Knee After Replacement Surgery?

Yes! I had double knee replacements on Feb. 2008, At the time the Dr. told my husband my left knee was too small , and he had a hard time with it. Then I also was found to have a blood clot in that calf. That replacement has never worked right, THEN, 8 weeks after the surgery, I suddenly began to have a very itchy, red bumpy rash from the knee down the front & inside of that leg. and all these years I keep being told that I have dry skin even though I continually apply several types of creams, aquaphor, even steroid creams subscribed for me. Then in Oct. 2012 it began same way on my right leg; below the knee. I have asked & asked if I could be allergic to the glue & commented that I was not asked about Nickel, ( I am allergic to it), but was told that there was no Nickel. I am so frustrated, & with constantly using the steroid cream, my skin is very thin, red & all my blood vessels now are prominent! It is an ever on going discomfort. Do you think this could be from the glue or a bit of Nickel in the Prothesis?