I noticed 2 days before that I developed Red rashes around anus on one side only. I had unprotected exposure in Dec 2013, but all tests are negative except bacterial infection on penis. And also I was on antibiotics from last 10 days amoxicillin+Ciprofloxacin from 22_31 March , Just after 2 day of finishing prescription I developed these rashes. Please help me can it be any STD, I just feel very mild burning,irritation only.
Please see photo attached..in photo on right down side rash you can see