Wrong.
He's experiencing either tissue irritation, an abcess, or possibly an infection.
This was taken from the 101 sticky written by Nate, it's there for people to read, don't know why no one ever does...
An infection will start in the same manner as tissue irritation with local pain and swelling, with heat and redness around the muscle. The major difference is that after 72 hours tissue irritation should start to subside, if the area is indeed infected this pain and swelling will get worse. The swelling will change in nature becoming more systematic and edema will start to form under the skin becoming softer and more spongy (as described with a lymphatic puncture).
So basically the main way you determine what's going on is when the shit happens and when it begins to subside.