Causes

There are several causes of encopresis, including constipation and emotional issues.

Constipation

Most cases of encopresis are the result of chronic constipation. In constipation, the child's stool is hard, dry and may be painful to pass. As a result, the child avoids going to the toilet — making the problem worse.

The longer the stool remains in the colon, the more difficult it is for the child to push stool out. The colon stretches, ultimately affecting the nerves that signal when it's time to go to the toilet. When the colon becomes too full, soft or liquid stool may leak out around the retained stool or loss of control over bowel movements may occur.

Some causes of constipation include:

• Withholding stool due to fear of using the toilet (especially when away from home) or because passing stool is painful
• Not wanting to interrupt play or other activities
• Eating too little fiber
• Not drinking enough fluids
• Drinking too much cow's milk or, rarely, an intolerance to cow's milk — though research results conflict on these issues

Emotional issues

Emotional stress may trigger encopresis. A child may experience stress from:

• Premature, difficult or conflict-filled toilet training
• Changes in the child's life, such as dietary changes, toilet training, starting school or schedule changes
• Emotional stressors, for example, the divorce of a parent or the birth of a sibling