No pain in the anus is not itchy is uncomfortable is generally caused by rectal tumors, proctitis, external hemorrhoids, rectal polyps and other diseases. 1. Rectal tumor: Rectal tumor is a tumor that occurs on rectal mucosa, which may be caused by malignant transformation of rectal tissues and is easy to become cancerous. Usually patients will have symptoms such as abdominal discomfort, blood in stool, accompanied by obvious feeling of incomplete bowel movement and frequent bowel movements. Rectal tumor usually needs surgery. 2. Proctitis: Proctitis is generally an inflammation that occurs on the surface of rectal mucosa, which usually manifests as diarrhea, bloody stools, and a feeling of falling down in the anus. Proctitis may be caused by foreign body irritation in the rectum or sexually transmitted diseases, and can be treated with medication under the guidance of a doctor. 3. External hemorrhoids: External hemorrhoids are hemorrhoids that occur below the anal dentate line, usually manifested as a foreign body sensation in the anus, anal swelling and other symptoms. External hemorrhoids may be cut during defecation, and blood in the stool will appear. And persistent blood in the stool will show anemia. Repeated episodes of external hemorrhoids will also cause perianal skin erosion, but there will be no itching, pain and other symptoms in the early performance. 4. Rectal polyp: Rectal polyp is a kind of elevated lesion formed on the surface of rectal mucosa, the shape can usually be flat or granular, without itching, pain and other symptoms. Irritation of the intestinal wall by rectal polyps can cause bowel movements to become more frequent and there can be internal urgency. When symptoms of discomfort in the anus occur, patients are advised to go to the hospital for examination, clear diagnosis and then give treatment under the guidance of professional doctors.