i've always injected my pecs and love it.....last time i injected I got a dark bruise that was the size of a quarter and very dark, can still partially see it and it's been a week...the next day my other pec followed suit, just not as bad. I can't really be having this happen and am not even sure why it did. I'm only injecting fina into em, done this hundreds of times...Anyone know why this would happen and if i can do anything to prevent it in the future?