Genital herpes is a sexually transmitted disease (STD) caused by the herpes simplex virus type 1 (HSV-1) or type 2 (HSV-2). HSV-1 often causes oral herpes while HSV-2 usually cause genital diseases. Most people with genital herpes have no symptoms or have very mild symptoms. Clinical manifestations of genital herpes differ between the first and recurrent outbreaks. A positive result of Herpes simplex virus IgG indicates past, current, or chronic infections while positive IgM antibodies show recent infection.