In life, many etiologies can lead to abnormal fecal excretion processes. Depending on the nature of the symptoms, different disease characteristics can be reflected. Abnormal fecal passage usually occurs during bowel movements. However, abnormal fecal passage is usually caused by a variety of diseases or adverse factors, mainly irritable bowel syndrome and blood in the stool. These disorders may be a type of functional bowel disease, such as irritable bowel syndrome, and the cause of abnormal stool passage must first be identified before treatment. Common causes of abnormal fecal discharge process: Rectal diseases causing abnormal fecal discharge process: Rectal polyps are benign tumors of the rectum, blood in the stool is the main symptom of rectal polyps, and rectal polyps close to the anus can sometimes come out of the anus, accompanied by abnormal fecal discharge process. Anal disease causes abnormal fecal discharge process: Anal disease is the most common cause of abnormal fecal discharge process, abnormal fecal discharge process caused by hemorrhoids and anal fissure are manifested by anal pain, serious can spray blood, blood is bright red, blood and feces do not mix, anal fissure caused by blood in the stool is often accompanied by pain and pain in the anus after defecation, resulting in abnormal fecal discharge process.