It has a lot to do on how you inject what happends afterwards. If you shake a lot, tense up, move around while your injecting your tearing up tissue. So the worse the injection site is going to be. I got so good and so quick I got no problems with my sites. Just dont fear the needle and get used to it. I remember I used to shake and work the needle in slow and easy. I found out this was worse. Just master the shot and keep it a clean straight injection. You'll learn. It gets easier. IMO