ALWAYS expect some amount of pain when trying a new injection site,some places hurt more than others....people not accustomed to injection pain are going to be worried as hell at first,but actually unless the injection site becomes red and hot to the touch you don't have anything to worry about.
just be patient and don't freak out about it,apply a heating pad and take an anti inflammatory to minimize any swelling that might occur
i always inject in my thighs. the only time i had a prob was with a 3 cc with winny, prop, and tren... that one hurt.... but other than that i find if i bake the gear it never hurts.
if you inject in the correct place you won't even be close you to your sciatic nerve,the nerve is closer to the center of your ass not the edge where you should be injecting.inject in the white area of this pic
I have done my second shot of Sustanon/250 and it hurts every time for 2 days afterwards. I can't hardly walk I have been inj in my thigh is it better in your glutes.
personally i was dreading the sust pain, but im 3 weeks in (6 shots) and havent felt a single thing. might be something to do with adding deca??? but no pain wat so ever.
another thing i do that 'might' help is running it under the tap. really hot water for a min or so gets it closer to body temp.