I had "jock itch like" symptoms that have cleared up but 1 week later my scrotum is very red with a distinct white line (normal color skin) that goes from the base of the penis between the testicles. This line has clear definition from the rest of the scrotum. It is itchy when I get hot to take a hot shower and cold water is a quick relief from that itch. I am in an exclusive monotonous relationship but have only been sexually active once in the past month and that was right after these symptoms started. Lamisil has provided no relief. Any idea what this is?