Does anyone here inject insulin into their upper chest? I've been trying to give my stomach sites a rest (getting some slight scarring) and experimenting with this for my bolus injections. So far chest seems okay, fairly fast absorption, and not much pain, though I've only tried a couple of times so far. I don't really like using arms/shoulders/lower thigh as I don't have much pinchable fat there, and upper thighs/butt are what I use for basal (and also I find absorption slower there). I never see it suggested in the typical injection site diagrams - is there some reason against using it? The only reason I can see so far is that there is more hair there, and I think hitting a hair follicle can be painful, though it has been okay so far. I was also considering calves as another possible option.