There is no fastest treatment for anal itch, the efficacy varies from person to person and from condition to condition, it can be caused by allergies, infections, hemorrhoids and other reasons, the main use of metronidazole and other drugs for symptomatic treatment as well as sitz baths and other treatments. 1. Causal treatment: allergy should be anti-allergy treatment, such as taking loratadine, cetirizine hydrochloride tablets, etc.; infection caused by the appropriate application of metronidazole tablets, erythromycin ointment and other drugs; hemorrhoids caused by surgical resection or the use of hemorrhoidal ointment or suppository and other medication according to the situation. 2 symptomatic treatment: can be appropriate for herbal bath fumigation, such as compound cypress liquid, external compound polymyxin B ointment and other ointment, external hormone hydrocortisone ointment, perianal subcutaneous injection of methylene blue for closed treatment and other ways to alleviate the symptoms of itching. Anal itching should be timely to the regular hospital treatment, drugs should be used under the guidance of a physician, to avoid self-medication, causing adverse reactions.