Hi, so I’m going to just shorten this story as much as possible. When I was with my ex boyfriend my butt was always clear, we had sex without a condom, and I felt like we should get tested because of this. Turns out he had and STD (I want to say Syphilis ) and I didn’t so they gave me a shot to prevent it. A couple of days after this shot I started getting extremely itchy on my butt and noticed a red rash type started happening (I also am prone to stressing easily and my mother has Psoriasis) so I initially thought it was that. This red rash started having little bumps or blisters too and was only on one buttcheek and no where else. Never on my penis, just on my butt. It was itchy and bothersome for weeks I couldn’t stop scratching, i did bleed. Anyway, this eventually slowed down and I was just left with a mark (I’ll show below) anyway NOW i am concerned again because it seems to have maybe spread? or reappear? on my other buttcheek almost the same thing is happening , itchy, red blister things, I have not had sex since that ex of mine, and just scared and stressing if i have genital herpes (which would mean this is an outbreak) or something else. please help. Below is the remains of the first happening and what is currently happening. (I have just put on Cerave lotion to help put it at ease i think its working)