Problems with injecting :(

Recently every time I do my injection in my leg, I get a red bump that gets itchy ! Was just wondering if anyone else has experienced this and how to stop it from happening?!?!? :(

I get this if I use a short needle. Using a longer needle has always helped me. not sure if that helps you or not!

Well I was on 4mm needles which they changed to 5mm which didn't really help much, just left me with a lump and a bruise but thanks anyway :)