1.If there is often pain in the perianal area, accompanied by blood in the stool, it is considered enteritis. 2.Eating spicy and stimulating food often, or frequent constipation, accompanied by congestion and edema of the rectal mucosa, with erosion and ulceration. It is due to the stimulation of stool, the characteristics of mucosal damage, and the possibility of having hemorrhoids cannot be ruled out. 3.If there is fresh blood with blood clots, it may be ischemic enteropathy, and if it is dripping blood after stool, consider hemorrhoids, especially internal hemorrhoids. 4.For having fever or abdominal pain symptoms, it is necessary to rule out the presence of intestinal entrapment or ischemic enteritis, as well as mesenteric lymphadenitis. It is necessary to combine routine stool and blood tests and, if necessary, improve the colonoscopy to further clarify the diagnosis.