To investigate the asymptomatic shedding of herpes simplex virus (HSV) from women with recurrent genital herpes infection, and to assess whether inapparent shedding could occur, eight such women were examined thrice weekly for one month. At each visit colposcopy was performed and multiple sites sampled for HSV. During the study four women had no recurrence of HSV infection, but four had at least one positive viral culture. One of these patients was asymptomatically shedding HSV on nine of her 11 clinic visits. Two episodes of urethral shedding were detected. In this group of patients the presence of inguinal lymphadenopathy was appreciably associated with the isolation of HSV from the urogenital tract.