The unconscious outflow of stool, that is, fecal incontinence, is mostly considered to be acute gastroenteritis, anal fistula, anal sphincter relaxation and nerve abnormalities at the anus and so on. 1. Acute gastroenteritis: mostly caused by dietary impurity pathogenic microbial infection caused by inflammation of the gastrointestinal mucosa, the patient will appear abdominal pain and diarrhea, loose stools, stools, stools and other symptoms, and some patients may even have fecal incontinence. 2. anal fistula: also known as anorectal fistula, is the anal canal or rectum and the perineum of the skin connected to the chronic, infected channel, mostly caused by the anal canal or rectal abscess, the patient’s main manifestation of anal fistula for the external or intermittent outflow of a small amount of pus, blood or mucus secretion, part of the high level of anal fistula patients may also appear incontinence performance. 3. anal sphincter relaxation: the elderly, long-term bedridden or anal surgery patients, may make the internal and external anal sphincter function decline or muscle relaxation, resulting in holding back stool, fecal incontinence. 4. Nerve abnormality in the anus: If the nerves innervating the anal sphincter or smooth muscle are abnormal, there is a conduction block or sensory abnormality, it may also lead to fecal incontinence. Fecal incontinence, there are many other reasons, such as cauda equina nerve damage, trauma damage to the anorectal ring, etc. If the patient has long-term or recurrent fecal incontinence, it is recommended to consult a doctor in a timely manner to find out the cause of the disease, and to carry out targeted treatment, so as not to delay the condition.