Just posting to see if anyone else has experienced this same problem. I get from a verified source here with good quality products but I tend to get a knot in the glutes for about 1-2 days after injection. I use a 23 G to pin and even heat up the oil and massage the muscle before and after injection. I've heard Test C causes less pip for others? Any input would be helpful if this is normal or not. Or if the needle should be changed or switching oils.