A raised circle outside the anus after a bowel movement is generally not a normal phenomenon and may be caused by hemorrhoids, rectal prolapse and other diseases. 1. Hemorrhoids: usually due to prolonged improper diet, sedentary standing and other factors lead to venous mass, too much force or too long in defecation, may lead to increased abdominal pressure, the emergence of stool outside the anus raised a circle of the phenomenon. 2. Rectal prolapse: it may be due to abnormal development, increased abdominal pressure and other factors, resulting in part or all of the rectal wall shifted downward, thus appearing in the phenomenon of bulging circle after defecation, for the more serious symptoms of the patient can be taken to rectal suspension and fixation of surgery and other surgical methods for treatment. The appearance of a circle after the stool outside the anus, generally does not belong to the normal phenomenon, it is recommended that patients go to the hospital in a timely manner for examination to determine the cause of the disease, as soon as possible to give targeted standardized treatment.