After defecation, there is still poop flowing out of the anus, which may be related to anal sphincter relaxation, or it may be caused by anal fissure, anal fistula and other reasons. 1. anal sphincter relaxation: common in older people, along with age, is likely to lead to anal sphincter relaxation, resulting in anal sphincter function, resulting in weak bowel control ability, may lead to the discharge of poop out of the anus after the anus and the anus. 2. anal fissure: due to anal fissure disease, may lead to localized skin and mucous membrane unevenness of the anus, in this case defecation, is likely to cause fecal matter left behind, which may appear after defecation anus and poop out of the anus, can be accompanied by perianal itching, pain and other symptoms. 3. Anal fistula: If you suffer from anal fistula, due to untimely treatment, it is likely to lead to anal sphincter damage, resulting in anal sphincter dysfunction, resulting in anal incontinence, it may cause the anus after the bowel movement and poop out of the anus, which may be accompanied by perianal pain, itching, parianal pus and other symptoms. After defecation, there is still poop out of the anus, may also be caused by other reasons, if accompanied by obvious symptoms of discomfort, should be as soon as possible to consult a doctor, after diagnosis of the causative factors, to give targeted treatment, to avoid causing delays in the condition.