I would watch it for a day and see if it gets worse in color or size. If it doesn't bother him, that's a good sign. Since you are in Columbus, IN you may be able to call this nurse line that St. Vincent's Riley has set up. It's free and it's advice from a nurse. You just ask them if you should be concerned and the'll tell you whether or not you should see your ped. The number is 338-Kids. I don't know if it's 317 area code, but I would imagine it is since it's Indy based. If you can't reach them, my advice is just to keep an eye on it for a day or so b/c it may just go away on it's own. Could it be a bite of some sort?