How To Treat Itching Sensation And Rashes In Penis?

I have an itching sensation on the head and top half of the shaft of my penis. There are only small red spots that resemble a rash accompanying this. I have started using an antifungal OTC for jock itch, and that has helped, though I have only used it for two days. The only thing that really makes the itching flare up is arousal.