When is fecal impaction most likely to occur?

Fecal impaction is most likely to occur after suddenly stopping laxative use for constipation. This situation arises because the body can become reliant on laxatives to stimulate bowel movements. When these laxatives are abruptly discontinued, the digestive system may not immediately resume its natural function, leading to a buildup of stool in the intestines. This accumulation can harden and create a blockage, resulting in fecal impaction.

In contrast, a high-fiber diet, increased water intake, and daily physical exercise are typically associated with promoting regular bowel movements and preventing constipation, not causing it. A high-fiber diet and increased water intake enhance stool bulk and hydration, respectively, making it easier to pass. Regular exercise helps stimulate gut motility, reducing the likelihood of both constipation and fecal impaction. Therefore, the transition away from laxatives, particularly when done suddenly, is a significant risk factor for fecal impaction.