There are many reasons for anal bleeding, clinically, this situation, you need to go to the hospital in a timely manner for the relevant examination, to clarify the cause of symptomatic treatment, the following reasons are mainly: a. internal hemorrhoids, internal hemorrhoids bleeding is the most common clinically in order to blood as the main clinical manifestations of the disease, if the symptoms are light may be in the long squatting and sitting, continuous pressure to the anus only to have blood in the stool, but the condition is aggravated when the blood in the stool will be more The blood in the stool will be more frequent and the bleeding volume will be higher. Rectal polyps, the main features of rectal polyps are bleeding and downward movement, which are mainly found through colonoscopy and usually need to be removed surgically. Intestinal tumors, intestinal tumors are also accompanied by clinical manifestations of bleeding, but the blood is dark brown and mixed with the stool, so the clinical situation of blood in the stool must go to the hospital for systematic examination.