4. Constant Feeling of a Bowel Movement
If you have a constant feeling of urgently needing to have a bowel movement or to strain but no stool is passed, it is not a good sign. This feeling can occur even after having a bowel movement.
Changes in your pattern of bowel movements can be a sign of colon cancer. It can occur when a tumor blocks the bowel and prevents you from completely emptying your bowels.
If you persistently have the sensation of incomplete evacuation after a bowel movement, discuss the problem with your doctor.