Dude,
I have been having this problem with my injections of Test 400.
My injection site gets very swollen and warm to the touch and very painful!!!
The first time this happened, it took 3-4 days to go away. I figured it must've been a bad shot so I did it again this week in the other glute, and the same thing is happening. OUCH!
I almost can't walk!

I don't think an abcsess is going to form really quickly overnight like that and disappear in a few days, so maybe it's the 400 giving me tough reactions? I've heard that 400 is so strong and concentrated (much more the sust) that it can do that.

Anyone have some advice or ideas?