One fellow here had reported problems at his injection site, due to Firmagon (Degarelix). I have these injections monthly in my stomach area, and I don't have such big problems; so last week, I asked my nurse, "What are your tricks?" She said:
1) Pinch the skin of the stomach using index finger and thumb. Pinch about 2 inches of the skin and inject into it. (I lie on my back, so her pinch pulls the skin upward, opposite gravity). This makes the pain of the pinch is much worse than the pain of the injection!
2) Do a quick injection. She's usually done in a few seconds.
Typically, I feel irritation on the stomach injection site for a few days, but it's as a bee sting. It goes away in a few days.
I'm hopeful this helps the other fellows having trouble.