Fresh blood in the stool every so often is generally considered to be caused by hemorrhoids, anal fissures, tumors and other diseases. 1. Hemorrhoids: commonly found in rectal perianal blood in stool, may be caused by poor dietary habits. Excessive consumption of spicy and irritating foods and heavy drinking can lead to recurrence of hemorrhoids and bleeding in the stool. 2. Anal fissure: As anal fissure can cause blood vessel rupture, thus blood in stool will appear, characterized by stool and blood are separated. Dribbling of blood appears after stool, usually accompanied by dry stool or constipation and so on. 3. Rectal tumor: some patients’ tumors are located in the lower end of rectum, close to anus, and the mucous membrane on the surface of the tumor may be broken, which may cause the phenomenon of fresh blood in stool. Fresh blood in stool every now and then may also be due to other causes, it is recommended to go to professional hospitals to clarify the cause of the disease and then standardize the treatment under the guidance of doctors.