Genital herpes is an STD caused by 2 different types of herpes simplex virus (HSV). It looks like a cold sore or blister. While the virus is highly contagious, most people who have it don't get the cold sores or blisters.
If you’ve been infected with genital herpes, you may find blisters around your penis, vagina, or anus. Once the blister pops, you’ll have a sore in this area. Blisters can come back every few weeks or months.
Once you're infected with HSV-1 or HSV-2, you'll be infected with the virus for life. However, if you're one of the few people who get blisters/cold sores, they seem to become less frequent over time. There are no cures for genital herpes, only ways to suppress the blisters/cold sores.