My 15 month old son developed a runny nose two days ago, which then progressed into a mild fever (39 degrees celsius) yesterday. He also developed a small irregular-shaped red rash (about 3 square millimeters in size) at the corner of his mouth. We gave him 5 ml of Calpol twice (4 hours apart) yesterday for the fever, and decided to monitor his temperature and the rash. By this morning, his temperature returned to normal, however his rash had become more pronounced (more red). By this afternoon, he had developed four pimples (with whiteheads) over the area of rash, with some pimples appearing a couple of millimetres further down towards his chin . He also had developed a red rash just below the entrance to his nostrils. No rash exists elsewhere on his body. No fever is present any more. Any idea what this could be and what we should apply (if anything) to the rash / pimples? Note: as background information (may or may not be relevant to this), one of the kids at our son s baby day care had been diagnosed as having developed measles 1 week ago, however our toddler has already been innoculated against measles.