I also noticed that a lymph node in my groin on the opposite side of my body from the rash was tender, and I had a soreness in my ribcage. I applied
Neosporin to the area, and within a few days the rash had spread to include about 7 lesions, all small and centered on hair follicles.
I went to a STD clinic where the physician thought the symptoms were consistent with an acute staph infection, particularly because the symptoms were aggravated by the Neosporin.