Ong-Bak and his "Bump"

For about 3 weeks now, Ong-Bak has had a small bump on his jaw. It seems to us that it most likely a small infection caused by the cats fighting or something. About a week ago, I saw Ong-Bak with a patch of blood on his face where the bump is. Maybe it just burst on it's own, or he scraped it open. In either case, it drained most of the way and was much less of a bump for a few days. It has since returned to its previous size and has a nice scab on it from when it burst. Since Ong-Bak and Scimitar are being left with friends over Christmas, we figured it was a good idea to make sure it wasn't serious. We got a ride from a friend and took Ong-Bak to the vet. The young-looking vet inspected his bump, probed it a bit with her fingers, and said that it just felt like inflamed tissue, likely some kind of infection (possibly a bit of kitty nail got stuck in there or something). Of course there is always the possibility that it is some kind of tumor. Anyways, having the surgery to have a biopsy would be a little over $600. So, we headed back home with some anti-biotics, which he'll take for the next two weeks. Hopefully this clears things up. If it not cleared up by the time we get back, then we'll have to decide what to do for the little guy. Fortunately, it doesn't seem to bother him at all. I haven't seem him scratch at it yet, his appetite hasn't changed, and he doesn't seem sick. I know cats are very good at hiding pain, but his behaviour hasn't changed at all and he doesn't react unusually to being touched in the area of his bump. Anyways, here are a few pictures of the little guy. Since returning from the vet, Scimitar has assumed occupancy of the cat carrier (she didn't come along) and Ong-Bak has just been chilling out as usual. The first picture shows his bump, though because of poor lighting and his moving head, it looks mostly like a red bloody/burry splotch. It looks kinda gross now, but when it's "clean" it's just a small bump with a scab. This whole ordeal reminded me of the time Moses (the second cat we had as a family, and the first I really knew) got hurt fighting another cat or something and got a really nasty infection on his chest. Aaron and my parents probably remember it much better as I was still pretty young at the time, but I remember there being a lot of puss.