Anal cracking and itching may be caused by anal fissure, perianal eczema, hemorrhoids and other factors. 1. anal fissure: a relatively common clinical anal disease, may be dry stool, constipation and other factors, generally refers to the anal canal skin layer cracked after the formation of small ulcers, clinical symptoms are generally manifested as severe pain, bleeding during defecation, and so on, some patients may be due to the fissure by the mucus stimulation, the symptom of local itching. 2. Perianal eczema: generally belongs to the perianal skin diseases, caused by a variety of factors, such as inflammation, trauma, allergies, heredity, etc., and its common clinical symptoms manifested in the perianal skin pinhead-sized pimples, itching, excessive scratching may lead to pimples ulcerated, the formation of vesiculobullous small fissures. 3. hemorrhoids: if the hemorrhoid patient’s stool is relatively dry, hard, friction, pressure generated during defecation may lead to hemorrhoids surface ulceration, fissure. If there is local inflammatory stimulation of hemorrhoids, or there is mucus oozing, itching may occur. It is recommended that patients with anal fissures and itching go to the hospital in a timely manner to make a clear diagnosis and give timely treatment to avoid delaying their condition.