Herpes is a common viral disease characterized by painful blisters of the mouth or genitals. You should also avoid stress which can lower your immune system. Blood tests are available but the most positive way to find out if you have genital mycosyn pro is to be seen by a doctor at the time of an outbreak. The medical profession implores all Americans currently engaging in any type if sexual activity to get to a certified STD clinic and undergo herpes testing. I have had too many people in my clinic and through the Internet say to me, "I don't have herpes, I've never had an STD, but I do get these cold sores on my lips".