More HPV Pictures?
Anal warts are the same types you would find on the penis or vagina. Anal warts tend to be more cumbersome in treatment, and more prone to spreading. Several treatment approaches are available including cryotherpy, aldara or podophyllin; your dermatologist or gynecologist would be the best person to advise on which treatment would work best.
Since the warts seem to be most persistent in this dark humid area, it seems that wearing a cotton underwear that breathes will help keep the area more dry or less clammy Some have reported using a baby powder not directly on, but in the area surrounding the anus or perianal warts helps keep the moisture level down and therby helps limit any spreading or growth. This technique doesn't seem to have a professional reccomendation per se, but it has been reported by several of our HPV Support users who have journaled their experiences with anal warts.
While some strains of HPV commonly cause precancerous lesions in the cervix of women, the occurences of these cancerous changes on the anus is dramatically lower - with most of the cases resulting from severe immunopression from certain medications or HIV. For more information on this subject in detail, please visit: Anal Warts, Anal Cancer and Anal Pap Smears information page from the GAPHR.