The itching inside the anus requires targeted medication according to the cause of the itching. It may be caused by an acute attack of internal hemorrhoids, which may also be accompanied by pain, bleeding and prolapse of the nucleus of the hemorrhoid. You can use potassium permanganate diluted and then wash it locally, and then use Ma Yinglong hemorrhoid suppositories inserted into the anus for treatment, together with oral cefdinir dispersible tablets, amoxicillin capsules, Sophora flower powder, Sophora horn pill, anti hemorrhoid pill and so on for treatment. It may be caused by anal eczema, you can use furnace glycolate lotion to apply to the affected area, then use Denide cream with the application, and then you can take oral treatment such as wet poison clear capsule. If the perianal abscess is caused, the use of medication is not great and surgical incision and drainage is required. It is not excluded that the itching is caused by anal fissures, anal fistulas, etc. It is recommended to go to the hospital for examination and treatment in time.