Hi R.~
I haven't had that happen, but since I work in the med. field (there is a pediatrician in our practice), I thought I'd give you my 2 cents. One one hand, it seems like everyone is sick right now with a summer cold, my sons included, so it could just be a virus that will get better with some TLC from mommy! However, I'm sure your whole dilemma is b/c you don't want to ignore something if it's more serious. If it were my son, I'd boost his Vit C intake and wait it out (if he doesn't develop any more symptoms) for a few more days and see what happens, but check out his throat and see how it looks. Also, pay attention to any complaints...my 3 yr old told me for 2 days that his throat hurt, and then I noticed that he was pointing to his belly! :)