<s>[INST] Had lower abd. Pain last year. Had Cat scan resulting in a large renal stone. Stone zapped, stent in 12 days. Pain gone until 4 days ago. Lower abd. Pain is back. Hx ofmdiverticulosis. Cat revealed 2 gallstones and no rectal polyps. One rectal polyp removed 20 years ago. I m scoped q. 5 years. Family Hx of colon ca., father and brother. I am a non smoker. [/INST] Hi, Dear,Thanks for your query to Chat Doctor. Dear I read your query and reviewed it with context to your query facts. I understood your health concerns and feel Concerned about them. Based on the facts of your query, you seem to suffer from-Colitis with ? Diverticulosis.this is mostly causing pain in lower abdomen. Though suffering With multiple ailments, in view of Family history of Colon Ca, I would suggest Colonoscopy for to rule out the current status, to fix the cause of the lower abdominal pain in your case. You need to consult GI Endoscopic and get assessed for it and treat it accordingly. Hope this would help you to treat your health issues in the best way possible. Welcome for any further query in this regard. Good Day!!  Chat Doctor. N. Senior Surgical Specialist. S. Genl-CVTS </s>