I've been on sustanon for 14 weeks and am in my final week, I have been shooting my quads throughout the entire cycle (mostly because they were the least sore the next day), I have noticed that it is starting to become unbearable to shoot my left leg like it hurts way more to pierce the skin and it is almost too painful to even shoot sometimes throughout out the whole shot. I first thought was that I was just hitting a nerve but I have switched my location over 5 times now so I am almost certain that I haven't been hitting nerves each time ( i could be wrong ). My right leg which Is also my dominant leg is not painful what so ever it is almost too easy to shoot. I'm curious as to whether anyone can shed some light on this subject or if anyone has expirienced similar problems.