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Genital herpes is a highly contagious infection that is caused by a virus. Genital herpes causes fluid-filled blisters or sores on the skin on or around the vagina or penis. The infection can also cause blisters on the anal opening, on the buttocks or thighs, inside the vagina on the cervix, or in the urinary tract of women and men.

The infection is caused by the herpes simplex virus (HSV). There are two different types of HSV:

  • Herpes simplex type 1 virus (HSV-1)
  • Herpes simplex type 2 virus (HSV-2)

HSV-2 is usually the cause of genital herpes. But, it can also be caused by HSV-1. HSV-1 is the virus that is associated with cold sores on the mouth.

HSV is a very common sexually transmitted infection. It is transmitted from skin-to-skin contact, especially in places that are warm and moist. The virus enters your body through a cut or opening in the skin. It can also enter through the moist inner lining of the urinary tract, in the vaginal area, the mouth, esophagus, stomach, intestines, and anus.

Once inside, the virus stays in the nerve cells of your body. The virus is still there, even if you do not have any symptoms of genital herpes. Genital herpes is a chronic, life-long infection with symptoms that can come and go throughout your life. But, the frequency or severity of the symptoms may decrease over time.