Anal warts is challenging , following CDC recommendation for treatment:
Recommended Regimens for Anal Warts
Cryotherapy with liquid nitrogen
OR
TCA or BCA 80%–90% applied to warts. A small amount should be applied only to warts and allowed to dry, at which time a white frosting develops. If an excess amount of acid is applied, the treated area should be powdered with talc, sodium bicarbonate, or liquid soap preparations to remove unreacted acid. This treatment can be repeated weekly, if necessary.
OR
Surgical removal
Recommended Regimens for Anal Warts
Cryotherapy with liquid nitrogen
OR
TCA or BCA 80%–90% applied to warts. A small amount should be applied only to warts and allowed to dry, at which time a white frosting develops. If an excess amount of acid is applied, the treated area should be powdered with talc, sodium bicarbonate, or liquid soap preparations to remove unreacted acid. This treatment can be repeated weekly, if necessary.
OR
Surgical removal