It is because I had a hard time going to the bathroom, with pencil like stools and the need to push hard to evacuate even though my stools were very soft. The surgeon believed I was having rectal muscle spasms triggered by the surgery. There is a possibility of a prolapsed rectum. I also take very warm sitz baths and insert a compounded gel twice a day. The PT has also showed me how to massage my colon to soften scar tissue and to get things moving.