put a 50c coin in freezer and when jabbing time put in on your injection site before sticking the needle in - supposed to numb the site

I never tried it but many swore by it (instead of the needle LOL)

Or you could try the chicken cream (EMLA $80 tube -it numb the site too) - when I was nursing we used it on kiddies - but one look at needle and they were struggling anyway - no amount of convincing worked