But landmark research reported today by microbiologists at Duke University may offer the potential for a cure.
So you can educate yourself about sex with herpes, including what precautions you can take, what your chances are of getting herpes, and types of sexual encounters as they relate to herpes.
There's nothing worse than that tingling feeling to tell you a cold sore is on the way.
Whether it's before a big day out or just ahead of that important interview, they always seem to pop up at the worst possible time.
In more severe cases doctors may prescribe antiviral tablets, which most people find more effective.
Cold sore patches are also available which are placed over the cold sore to hide the sore area while it heals.