^^^ if you keep injecting shallow and hitting the same spot over and over you will get an abcess. its actually likely, not unlikely.
another issue is scar tissue that will build up from injecting the same spot. too many guys need to learn to inject other muscles and not the same ones over and over.
another issue is scar tissue that will build up from injecting the same spot. too many guys need to learn to inject other muscles and not the same ones over and over.