TweetSome people complain about it, have him not aspirate as much only as much as he needs that can cause soreness also I would get sterile oil and dilute it if the pain bothers you! Also some people report no pain from it, others report less pain each shot aftre a few shots it went away and some say they get zero pain from it like THE BOUNCER! Try injecting the glutes more with it and mix it with something you can also run the syringe under hot water for a minute or so then inject and that can really help!