Digestive Disorders Health Center
Encopresis
Overview of Encopresis
Encopresis is the soiling of the underwear with stool by children who are past the age of toilet training. Because each child achieves bowel control at his or her own rate, medical professionals do not consider stool soiling to be a medical condition unless the child is at least 4 years old. This stool or fecal soiling usually has a physical origin and is involuntary -- the child doesn't do it on purpose. A large amount of hard stool is in the intestine, and stool leaks around this mass and out through the anus.
In the United States, it is estimated that 1-2% of children younger than 10 years are affected by encopresis. Many more boys than girls experience encopresis; approximately 80% of affected children are boys.
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Causes of Encopresis
Rarely, encopresis is caused by an anatomic abnormality or disease that the child is born with. In the great majority of cases, encopresis develops as a result of chronic (long-standing) constipation.
What is constipation? Many people think of constipation as not passing a bowel movement every day. However constipation implies not only infrequent bowel movements, but also having difficulty or experiencing pain with the passage of bowel movements. Pain is usually the initial problem when bowel movements are hard and difficult to pass.
- Each person has his or her own schedule for bowel movements, and many
healthy people do not have a bowel movement every day.
- A constipated child might pass a bowel movement every third day or less
often.
- More importantly, the constipated child tends to pass large and hard stools and experience pain while doing so.
In most children with encopresis, the problem begins with passing very large stools or having pain while passing stools. This may have happened long before the encopresis starts, and the child may not remember this when asked.
- Over time, the child becomes reluctant to pass bowel movements and holds it
in to avoid the pain.
- This “holding in” becomes a habit that often remains long after the constipation or pain with passing bowel movements has resolved.
As more and more stool collects in the child’s lower intestine (colon), the colon slowly stretches (sometimes called megacolon).
- As the colon stretches more and more, the child loses the natural urge to
pass a bowel movement.
- Eventually, looser, partly formed stool from higher up in the intestine
leaks around the large collection of harder, more formed stool at the bottom of
the colon (rectum) and then leaks out of the anus (the opening from the rectum
to the outside of the body).
- Often in the beginning, only small amounts of stool leak out, producing
streaks in the child’s underwear. Typically, parents assume the child isn’t
wiping very well after passing a bowel movement, and they don’t worry about the
smears.
- As time goes on, the child is less and less able to hold the stool in-more
and more stool leaks, and eventually the child passes entire bowel movements
into his or her underwear.
- Often the child is not aware that he or she has passed a bowel
movement.
- Because the stool is not passing normally through the colon, it often becomes very dark and sticky and may have a very foul smell.
WebMD Medical Reference
