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. People with anal herpes may complain of constipation, diarrhea, abnormal stool consistency and foul odor. In people with longstanding anal herpes, weight loss can occur due to voluntary food restriction in an effort to avoid pain and other symptoms associated with bowel movements. Anal herpes is an infection, which is an outcome of herpes virus infection. It causes painful sores or blisters to erupt near or inside the anus. Painkillers may help to reduce the pain and inflammation, but they are not the sole treatment for anal herpes. anal herpes, also known as genital herpes is caused by herpes simplex virus and is one of the most commonly transmitted sexual infections. The worst part of this virus is that it may not cause any symptoms on your genitals but still you become contagious and infect your sex partner. Anal herpes, along with hemorrhoids and anal fissures, can cause a knife-like pain during bowel movements with the pain lasting for up to 15 minutes after the movements complete. 1) if you have anal herpes, it is due to hsv-1 and there is little or no risk of transmission to your gf. Anyone with herpes can tell you the worst part of the condition is the pain and embarrassment of outbreaks. You dont have to be late for work, cancel on your date, or cry yourself to sleep in pain. Sometimes, rectal pain is accompanied by other symptoms, such as itching and stinging. Its rarely serious, but getting to the root cause can help you find relief.