Pain after injection ?

[wrestless]

Guys I know this has been asked probably a million times except i really dont know why I am getting so much pain after my injection. Lasts for about 4 days also I am sure all gear is legit. I am running 500 Deca and 400 test per week. Ran the same cycle about 4 months ago and had no pain whatsoever.
Also my injection site is Quads could I have to much scar tissue build up and it is not dispersing correctly ? Any help with this ?

[Bossman]

If I take a break and then start up again, I have some pain for a week or so at my injection sites. I would look into another area to inject, like glutes just to make sure your quads are recovering though.