It occurred to me that I've never asked another T1 about this. When I was on MDI, I very frequently did my shots on the outsides of my upper arms. This was suggested as a good spot when I was diagnosed back in the 80's, and it tended to be the most accessible place, as well, for me. Well, years of injections have turned the muscles pretty hard, and I can tell that my arms have gotten bigger in proportion to the rest of me. Not ridiculously bigger, but I can tell, you know?
I'm wondering if anyone else has had a lot of scar tissue build-up like this, and if there was anything that can be done about it.