Im running a tren ace, test prop, and masteron mix. For some reason whenever I inject in my delts, my upper arm area gets itchy later on in the day. Then I start getting what looks like hives in the area after scratching it but it goes away after a while. This time around I woke up the next day and the middle part of my bicep is a little red and looks deformed and/or swollen, there's no pain. Does anyone know what's causing this?