I just got over an abcess in the left delt. I got it from my weekly HRT injection of 100mgs of upjohn test cyp. I know for a fact that it wasn't the test. I've been giving myself a weekly injection for close to 3 yrs now and have never got an abcess from doing it, even during all my cycles, including shooting winny ED for 4 weeks straight. I'm a very clean person ESPECIALLY when it comes to injection protocol but shit happens. I had to take 3 antibiotics before mine went away, but at least I avoided surgery.