Hello, I had sex about a week ago and started getting dry but proceeded to have sex even though the inside part of labia was hurting. I continued to wear tight underwear everyday, and a week later I had sex again. After that sex, a blister or cyst came out. It was like a pink bubble with a tiny red blob on the inside. I also had a little bit of blood on the tissue I wiped myself with. I then checked my inner labia and there were more of those blisters that had come off of me.

I’ve only ever had sex with one man my whole life. I’ve also been tested negative for STIs.

Could these blisters be caused by irritation from sex or tight underwear?