Anal itching includes the following causes: first, anal eczema: because of the dampness around the anus, it is easy to complicate eczema these diseases, complications of anal eczema will appear more obvious itching symptoms. Second, external hemorrhoids: local mucus stool can appear and cause irritation, resulting in local anal itching. The third, fistula perianal abscess or anal fistula: because the fistula opening outside the skin anus, the intestinal cavity of the liquid or feces through the fistula discharge, around the anus to stimulate the local skin, mucous membrane and produce itchy situation. In short, the anal itch must go to the hospital in time, through the surgeon’s detailed examination or anoscopy, to find the specific cause of the itch, according to the cause of the systematic treatment.