All your responses to my mystery have been so thoughtful and helpful. I went to my GB surgeon 3 times and he seems almost clueless and keeps saying "You are fine". He says not hernia after a 2-second check. My internist says not diverticular., but it seems like a muscular problem. They both suggest colonoscopy. But now that I think I may have discovered problem (abdominal adhesions) myself, I think that needs to be addressed before a colonoscopy? Would that make sense? I have not had one in 10 years. Age 70+. Physically very active (when normal). Busy lifestyle. Interestingly, Cleveland Clinic's website says "Listen to your body." Seems so important.