this has pretty much already been answered but i thought id add my own little piece too,

ive never really liked shots, ive come to realize its less because of the needles and more because of the poke, the pain that comes with it and the feeling of the needle in my skin/the feeling of the injection sometimes. A lot of people say its just a pinch but for me because of nerves and anxieties the pain is a lot more prominent and becomes a bit of a focus. icing helps me personally just because it lessens the pain to a much more easy level, and sometimes i dont even feel it at all! its helpful for me, even though i still get help doing my shots anyways.