When doing sub-Q injections, is the goal to make a bubble on the skin, or is ik ok to go thru the skin into a fat deposit in the belly area? I use 5/8 slin needles and want to make sure I am pinning the HGH right. When I pull the needle out a little, I get a surface bruise. Is this ok, ok am I fine pinning into the fat deposit? I generally grab some skin by the belly button an few inchs away, pin and done. Should I be pinning shalower?