My son is 14 months and teething like crazy. He got this rash after a high fever due to teething, I think. And the rash isn't gone yet. I took him to the doctor yesterday and they don't know what is wrong with him either. Yesterday it was bad on his cheeks and today, it's like there isn't anything there. They want tests to see if it's measles. But, is there some teethings cases that cause rashes for a few days? If so, How is it treated? Do I need to make another appointment?