kind of strange .. I am taking 4 iu's daily of red tops, I took last week off from lifting for some rest. My right shoulder started killing me wed, I did not lift @ all last week. I took hgh last year started @ 3 iu's then bumped up. I have been taking hgh for about a month now @ 4iu's of the red's. Could this be causing my shoulder pain, I have had a little knee pain too in my left one.. I know sometimes hgh might cause some joint pain... any suggestions...