Oops hope I didn't disappoint you. Think of this: Have you ever seen a diabetic with a really big thigh? (Where he injects all the time?) Nope. Insulin is a hormone that must become systemic before it has its effect, so no localized effect. I am personally dubious that even IGF has localized effects, (long term, anyway) although the Benzyl Alchohol it is suspended in might cause localized damage and seem to have an effect. (Inflammation can seem like a pump.) Now many bros will disagree with my theory, I'm not saying I'm right, just that this is what I suspect.
~C
Oh, what would have a localized effect? I hear winstrol may be suspected for that. I dunno, try exercise. And lots of stretches. Maybe IGF really does work, see if you could find some without BA, maybe some powdered and add water with 0.9% salt, or ringer's lactate. Sorry.