Well, I didn't exactly find out from any doctor, but I think he was just cutting some teeth because after his little mouth finally started to clear up he had two teeth come in. One right in the area where he had a huge blister thing. I have 3 older boys and none of them ever had anything like this happen to them when they were cutting teeth so it really freaked me out! His little mouth really looked like someone had just busted his lips really bad on the inside and out!
Did you ever find out what was wrong?
His tongue isn't coated white. I've already thought about thrush and the dentist didn't seem to think that is what it was. His little lip looks like he has a fever blister on the outside.
Have you though about thrush-- is his tongue coated white?