<s>[INST] I had left lower abdominal stinging pain that ranged from low- just above the pelvis almost to my waist. It was strong and persisted for about 4 hrs until I tried Ibuprofen and it felt somewhat better. It worsened when I walked and it radiated to the left side of my back. I am regular in my bowel habits - every morning and lately it seems I am having maybe 2-3 small BM s in the day. I do not have any bleeding but, there is often mucous present now and gas 3-4 times a day - usually before BM. I did have my gallbladder removed about 5 yrs ago and never had any of the horrible side effects after (I d always heard about diarrhea or difficulty w/bowels after surgery). In fact, I have been very regular each morning. But, only occasionally have loose stools - never diarrhea. The pain has been better today. The other sx I have is reflux and indigestion almost daily for about 3-4 weeks. [/INST] Hi. The cause of your abdominal pain, mucus in stool, flatulence and gases before BM, loose stools re-flux and indigestion can be due to severe form of colitis as per the history provided by you. As per your history I can think of Cancer of the colon - hence causing the severe pain due to obstruction; passage only of the gases before BM; loose stools ; Get a CT scan of the Abdomen, Colonoscopy and related investigations so that the proper diagnosis can be made and treatment planned accordingly- whether Surgical or medical. Cholecystectomy (gall Bladder Removal)5 years back may not be the reason for all the symptoms you have. </s>