if you really want the best help we can give you post up pictures and even videos of your injections
that would be the best thing for us to help you and it's free
you didn't tell us anything
We don't know which gear you're using or what brand
we don't know what size needle you're using or anything else like that
help us by getting a log up
I agree with everyone else we don't know enough about you to give you an honest answer
the only thing I can tell you is the lump can turn into an infection
What length of needle are you utilizing ? Typically I do 25g and 1inch for the needle length, should be plenty deep enough at that point, also are you rotating injection sites ?