My male dog, Gomez, has raised red bumps around his mouth. They seem to develop, grow a little, burst, and shrivel up. There are never more than 4 or 5 at most, usually less. But they are only on his lips and chin, and they never seem to have heads on them like acne. They are just little bumps. Then, once they get big (about a week or so) they get a red pit in the middle and then with in another week go down. They don't stop him from playing or anything, but they are sore to the touch and he doesn't want them looked at. Also, I have never seen any discharge from them. I am sure they aren't serious, but this has been happening for a couple months now and I was just curious if anyone else has run across this. I suspect they might be some sort of contact allergy, but I am not sure. Thanks for reading.