The organs which help a person pass stool include rectum, anus, pelvic muscles and nervous system. The four of them must work together to control bowel movement. It also involves recognition and response to the urge to pass stool.
Bowel incontinence occurs when one loses control of their bowel movements i.e. they pass stool without their knowledge or control. This can range from passing small amounts of stool, gas to complete inability to control bowel movements.
It is imperative that you visit an incontinence specialist if you feel you are unable to recognize or respond to the urge to have bowel movements or feel like you have completely lost control of your bowel movements. Incontinence is a major sign that your anal muscles are not working as it should in your bowel movement system.
A major cause of incontinence is constant constipation which stretches the anal muscles making it weaken which either leads diarrhoea or leaky stools. Other causes include inaccurately assessing or avoiding times for bowel movement, long term laxative use, colectomy or bowel surgery etc.