Skin condition around anus

Patient: I had unprotected anal sex about 4 year before, i am worried i might have some kind of STD. i got tested for HIV/Syphilis test before, it was negative.

Symptoms: Scar like tissue around my anus. it’s dry now, but sometimes it gets wets, and sometimes it bleeds.

Images:
Skin condition around anus-1

Doctor: