I had surgery some months ago, in an outpatient surgery center. It was sinus surgery. When I woke from the anesthesia, I had excruciating pain my rectum. I was screaming about the pain in my rectum and jumping all over the bed. Then I felt I needed to have a BM. The nurses hurried me onto a bedpan, but I didn't need it after all. The pain subsided fairly quickly, I would say, in about twenty minutes. I have no bowel or rectum problems. Can anyone explain this?

Thank you.