My Gynocologist actually addressed the problem, . Your uterus may be dropped and thus gets in the way or you may have a hernia in which the feces collects. She recommended a solution other then operating. Hold a finger beteen the rectum and the vagina area and push. You'll find more feces will come out. Seems gross but it works! Sorry I can't explain it better.
Hi. I too have been suffering from very similar symptoms for years. I often have quite a sharp pain (no bleeding) when i start to go and can feel constipated, however my stool is usually quite loose. I then feel the same "stopping" sensation- almost as if there is a blockage or a tightening of my rectum. This usually leads to burning and discomfort immediately after I have been, but worse, I can then have just have an overall discomfort in the rectum which lasts for hours and is very annoying. To me, it almost feels as if the muscles in the area just wont relax, and strangely, if a pass gas, it can kind of make the sensation go away. I've been to the Drs and tried various creams, suppository's and laxatives, but as yet no improvement. I am going to see if I can get a more detailed inspection soon, so will post my findings.