Talk to Urologist on I Have Anal Itching

I have anal itching n buring problem visit to skin hospital they remove warts n they gave me medicine n after that I consult dermatologist he gave me medicine n told that u have fissure I consult surgeon at akuh they checked n said no fissure n no hemorids consult dermatologist.after that I consult dermatologist he diagnose that u have pruritus ani gave me medicine it works n after that same problem again then again I consult dermatologist at akuh he gave me medicine plz tell me how to cure