Hi... I had a very simular thing happen... My son was breaking out in what looked to be ringworm... We used over the counter medication... But they only got bigger, it seemed. I have 3 cats which I am very close to... But couldnt find ringworm on them... Or myself... Which was surprising. Then we noticed that no one else in the family had ringworm either! I asked the pharmicist about the medication and he pointed out the strongest... My son used that about 10 times a day... But the spots only grew very large, in size. So.... I took him in to see the dermitaligist... And we were surprised at the diagnosis... "pityriasis rosea" was what it was.... There is no known cause.... There is no known cure.... And it isnt contagis, either... (and my cats can't catch it, either!) upon further inspection my son had it all over. The Dr. Said it would leave all by its self, in about 4 months. I hope this may help!