A common question I hear in my office is "Do you have to abstain from kissing just because one of you has a cold sore?" In a word, YES...for awhile. Cold sores are caused by a highly contagious virus called herpes simplex, or HSV. It comes in two types known as HSV-1 and HSV-2. HSV-1 is the more common form of the virus and the culprit behind most cases of cold sores. HSV-2 is usually responsible for genital herpes. Both types of HSV are transmitted from person to person when an infected area comes into contact with a tiny tear in the skin, usually around the mouth or genitals. Once a person becomes infected with HSV, the virus will live in his or her body forever. So if you're looking to stay cold sore-free, it's wise to avoid direct contact with an active lesion. But it's equally important to understand that a cold sore on the MOUTH can cause herpes on the GENITALS, and vice versa. And to really elude oral herpes, follow the same precautions you would to avoid catching any infection. Refrain from sharing lip balm, a toothbrush (which you should always avoid sharing!), utensils, cups, or even towels with an infected person.Wash your hands often and avoid touching your face or genitals. And remember one really important fact: Even if a person with HSV-1 or HSV-2 is NOT having an outbreak, he or she COULD still be contagious. Blame viral shedding, which happens when the virus becomes quietly active in the body WITHOUT causing any noticeable symptoms. Because this may happen several days a year, always use condoms when having intercourse. During oral sex, women should use dental dams while men should still wear a condom. And while you don't have to swear off kissing forever, you SHOULD remember not to do it when you or your partner feels a cold sore coming on - signs of onset are itching, tingling, burning, or numbness. Taking these smart, simple precautions will both minimize your risk of catching cold sores, and help prevent spreading them back and forth! Watch more videos in this series for more cold sore information.