My son found a red worm moving about the toilet bowl in the toilet water (his toilet). It was about the thickness of pencil led, and approximately 4 to 5 inches in length. He called me to look at it. The toilet water was clean. However, he had just had a bowl movement. I have been giving him stool softener pills, as his stools are so hard, long and large that he often plugs the toilet. Does he have a worm problem? Or, did this worm find its way thru the plumbing?