Back in November I had unprotected heterosexual sex. Roughly 31/2 weeks later I got a rash by my upper rib cage that was very itchy. I applied rubbing alcohol to the rash and went away only leaving marks that are fading now. I went to a Dermatologist yesterday and she told me that the rash was a fungal infection and prescribed a topical medication. Could the rash have come from sex, or body contact?