Anal herpes is caused by the sexually transmitted herpes simplex virus. Learn how to tell if you have anal herpes and what treatments are available. Anal herpes a pain in the butt perhaps youre feeling a little funky in the butt. Like genital herpes, it is caused by hsv-2 and is passed on through sexual contact. Anal herpes can also leave bright red blood on the toilet paper, in the bowl or on the stool. It can even make you feel as though you have to pass a movement constantly. When herpes manifests around the anus, it often forms a small crack or fissure instead of the more typical blisters, ulcers or rash. This herpes simplex virus (hsv) infection can involve the genitals, anal area, or both. Anal involvement with herpes most commonly affects people who engage in anal intercourse. However, involvement of this area may be due to spread from the genital region. Cdc points out that most people with herpes have mild symptoms or no symptoms at all. Genital herpes is a sexually transmitted infection (sti) passed on through vaginal, anal and oral sex. Anal herpes is caused by herpes simplex virus, which is called hsv in short, form. An, even more, particular strain that causes herpes is hsv type 2. One important thing to know is that its not just herpes that causes these anal sores. Anal sex (as well as oral and vaginal sex) is another way to transmit the herpes virus from one person to another however, one partner needs to have herpes in order to pass it on. The symptoms of anal herpes include pain, itching, and sores in your genital area, but many people who are infected show no outwardly visible signs. You get herpes by having any kind of sex -- vaginal, oral, or anal -- with someone whos infected.