I had the same problem with taking Sustanon (ttokkyo). I would limp around for almost a week with each shot, and when I'd get better it was time for another one! People would ask me what was wrong and I would have to tell them that it was from doing heavy squats. I bared the pain for about 6 weeks before I finally said, "Fuck it, I don't need this shit." The bad part was that I couldn't do any leg work and it even hurt to lay down on a bench. One day my girlfriend slapped me on the butt and I fell to the floor like a sack of potatos. The only thing that seemed to help was about four 200mg Ibuprofins! Eventually, I switched to Cypionate. Prop sucks!!