I am a former drug addict, and I stopped 4 years ago, but recently I had a two week binge on cocaine. The second week I started injecting in my groin. On the final day I had swelling and soreness in the area and I snapped out of it and returned to being clean. That was eight days ago. Since then I have had pains in my groin area, but that and the swelling has mostly subsided now. I just have one small red area that may be an abcess, and I can feel some lumps beneath the skin (but I think that I had them from before and put them down to scar tissue). The main thing that has been frightening me is that the last two days I have been experiencing numbness in my right leg (and a little bit in my right arm today). They don t seem swollen or anything...