Loose or semi-liquid bowel movements do not open the anal canal properly. They stick to and irritate the anal skin. Bowel movements should not be too hard, too soft, or too small. If bowel movements are the right size and consistency, many colon rectal complaints will disappear. The simplest, and usually the only way to give bowel movements the proper consistency, is by eating fiber.
Fiber acts as a stool normalizer.
It prevents the stools from being too hard or too soft. It helps the bowels move one to three times a day, which is good for the anus. It prevents stools from tearing the anal skin and will prevent bowel movements from dragging the rectal lining out of the rectum. Fiber helps the bowel movements slip out more easily by making the feces less sticky. This helps to prevent them from adhering to the anal skin.