Hello! Thank you for the query. As you have recently had the abdominal surgery, your pain may be caused by it, or may be not related to the surgery. After every abdominal surgery, there is a risk of hernia in the place where incision was made. It can cause symptoms you have mentioned, and sometimes it can be life-treating. You should visit surgeon to rule it out. Such pain may be also caused by post surgery intra-abdominal adhesions. It leads to intestine obstruction and may be associated with constipations, abdominal bloating and nausea. To rule it out, abdominal X-ray should be done. If your pain radiates to one side back, it can be also urinary tract infection. It is associated with burning when urinating. Urine test will rule it out. If your pain is located in the left side of abdomen, it ca always be diverticulitis of sigmoid colon. If so, abdomen ultrasound should reveal diverticles (colonoscopy is contraindicated when diverticles are inflammated) and antibiotics might be necessary. Abdominal pain when passing stool might be also caused by anal fissure (but the pain is mostly located in anal area) and hemorrhoids. So you should see a doctor and have mentioned tests performed. Hope this will help. Regards