Aseptic meningitis is not an uncommon complication to primary genital herpes infection caused by herpes simplex virus type 2 (HSV-2). Compared with other types of viral meningitis, HSV-2-meningitis is associated with a significant rate of neurological complications in the acute stage. In addition, some patients will suffer from recurrent aseptic meningitis (Mollaret's meningitis) later. We describe six patients, five women and one man, age 26-35 years, with aseptic meningitis caused by HSV-2.