Anal bleeding and itching may be caused by hemorrhoids, rectal ulcers, anal fissures. 1. hemorrhoids: if you suffer from hemorrhoids complicated by infection will appear congestion, edema, hemorrhoids constantly stimulate the mucous membrane of the rectum or the mucous membrane of the anal canal will cause oozing, oozing secretions out to stimulate the anus caused by itching; in defecation, the stool will be repeatedly rubbing the hemorrhoids mucous membrane caused by the bleeding situation. 2. Rectal ulcers: patients with inflammation, erosion, or even ulceration of the rectum, diarrhea, abdominal pain, mucus, pus and blood stools, itching and other symptoms. 3. Anal fissure: constipation or repeated diarrhea during bowel movement will make the skin of the anal canal damaged under external force, and the injury occurs repeatedly, resulting in the whole layer of the skin cracking and forming ulcers, which will then lead to anal bleeding and itching. Anal bleeding and itching, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, give targeted treatment or treatment, to avoid delaying the condition.