I also have had a lot of pain in upper abdomen and back. I'm told that pain in the shoulder is common with this. I also have a lot of that. I just had an ultrasound which showed polyps the latgest being 6mm. I am going to have the gall bladder removed. This seems to run in my family as everyone including my 24 year old daughter has already had theirs removed. My dad died of colon cancer and ir their is any that in your family I urge you to consider having it removed. Polyps can turn to cancer and I want to see my grandchildren.