Rectal flaky erythema may be a manifestation of colitis, but it is not ruled out as a possibility of rectal cancer. Proctitis is an inflammation that occurs in the rectum, which is mainly manifested by the sensation of dropping anus, urgency, bloody stool, diarrhea, mucus stool or mucus and blood stool. Mild proctitis is just inflammation of the mucous membrane. In severe cases, the inflammation involves the submucosa, the muscular layer, and even the perirectal tissues. An examination report showing rectal erythema requires further determination of the cause of the erythema and treatment measures corresponding to it in order to avoid delaying the optimal treatment time. Generally speaking, rectal cancer is mainly caused by malignant proliferation of cells, which mainly leads to abnormalities of skin tissues, such as erythema, blackening and other symptoms. Daily diet should be light and easy to digest, stop smoking and drinking. You should eat more fruits and vegetables to avoid difficult bowel movements and irritation of the rectum, and drink more water. When abdominal discomfort occurs, you should seek medical treatment in time and standardize the treatment under the guidance of professional doctors to avoid delaying the condition.