I'm pinning 250mg (1ml) of Cyp E4D. I've used pharma grade cyp before and never had any pip. This stuff is from across the pond. The initial pin isn't bad at all, but man the next day there is a painful lump (not big at all) in my quads this go round. I can walk and WILL workout through the discomfort/pain. Working that muscle group seems to help for a bit but it comes back after cool down. What in the world is causing the delayed pip and is there anything that I can do to reduce it? I use a 23g x 1" to pin, push slow, hold the pin still, quickly withdrew, then apply pressure for 20-20 secs and massage. No blood and I do aspirate prior to pushing.