E.M.
Hi C.,
I have to admit--this is an extremely difficult post for me to respond to. Take the little man to the pediatrician. They can test him to tell if it is ringworm, or if in fact, a cigaratte burn like he says. Please remember, sometimes things do happen that you may not want to even think about. Perhaps he was burnt and it was a total accident? Nonetheless, never just brush your child off when they say something has happened--especially if there is extremely questionable evidence. Please, get a professional opinion. If it does turn out to be ringworm, then privately ask him why he has been telling everyone daddy's hurt him. Afterall, where would he get such an idea to begin with?
Best of luck to everyone involved!