Ernies arms were full of scar tissue.
Yeah in pics it looked like some weird acne type scarring on the skin, or massive amounts of small holes.
Regarding the pain from site injects. I have tried it as well but one inject and no more, biceps were fucked for a week, had to move with my arms bent. But obviously it's true that if you keep it up every day you will desensitize, they say after a week it's much better. Back when I started the ass was painful for a week from pharma gear. The other kids said they couldn't sit or lie normally on the bed. But you get used to it.