Many people don't have any symptoms and are carriers of the virus, spreading it without knowing so. When symptoms do show up they look like multiple tiny blisters on a red background that last up to 1 week and as time goes by the blisters join together. Sufferers get a painful, usually recurrent genital and groin rash with blisters, often preceded by itching or burning or tingling in that area. An initial episode occurs 2-12 days after exposure and is the most severe, occasionally accompanied by fever and swollen lymph nodes surrounding that area. Headache or muscle aches may also occur. If the sores develop inside the urethra (the tube that carries urine out of the body) or the vagina, there may be pain when urinating or vaginal discharge. Sores crust over and disappear in 2 to 3 weeks.
Recurrent episodes are often less severe. Having around 4 outbreaks a year is typical. Outbreaks tend to become less frequent and less severe over time. If not, medication taken regularly can block outbreaks from happening.