Hi there. It is a touch unclear what location exactly your genital herpes is in? Is it perchance the perianal region? I understand you are being treated for the herpes & the UTI. Did this numbness start after the onset of the treatment & if so, how much after? I do believe in masterly inactivity in this case & once these medications are stopped, then am sure it will all get back to normal. You may want to add a B-complex capsule called neurorubine forte which is one brand i know that is internationally marketed in the same name & is basically a B complex that will act as a supplementary medication or adjunct to your therapy; Locally, try using reparil gel on your buttocks that can act as a counter-irritant & may relive the numbness. Good Luck & Godspeed! Please do remember to practice safe sex hitherto. Cheers! Dr Praveen Rodrigues MD