My husband has scratches on his penis. When he pulls the fore skin they are more visible. He has been using peroxide to clean it and putting neosporin. It s not helping so when we went to the ER the doctor said maybe herpes (which I doubt very seriously. He gave him some antibiotics call valacyclovir. What does this medication do and what do. He said it itchy a little and burns when he don t stretch the skin