Ok, my buddy came into my gym this morning and had some problems with his last injection site. He injected yesterday morning, and today he has this lump on his shoulder that is about the size of a golf ball, maybe even a little bigger. When he told me to poke it, it felt really weird and rubbery. He complains that it itches all the time, and past injection sites always itch but have never swelled up like that. Is this normal or should I tell him to go to the doctor?