What Causes Red Blotches On The Head Of My Penis?

I have red blotches on the head of my penis. It is not an STD as I have not had sex in a very long time. However I remember masterbating in the bathroom at work and did not wash my hands. I coated my penis in neosporin for about 3 days and it seemed to have gotten worse so I tried lotrimin and after 2 days the botches are still there but the redness is gone. Would could I have?