<s>[INST] Hello doctor, I have a gastroenterology issue for over a month. I have a mild to moderate upper and lower abdominal pain on the left side. The pain also extended to my left leg. Also, I pass stool twice a day (diarrhea-like stool) with large white balls in it and I am facing weight loss. I took Trimebutine and Mebeverine for over four weeks (I have IBS), also I am taking probiotics and digestive enzymes. What is concerning me the most are the large white balls in the stool that are not mucus (they are quite firm) and the weight loss. Due to COVID-19, I want to avoid physically seeing a doctor, so please suggest a possible cause and treatment. [/INST] Hello. Yes, you might be having IBS (irritable bowel syndrome) and you might have developed small intestinal bacterial overgrowth (SIBO), with IBS which can occur commonly. In SIBO you get fat malabsorption which can lead to white stools. Can you please tell me whether you get greasy stools and bloating or not? Let me tell you that greasy stools are identified by a foul smell and floating on top of commode water. Also, share how much weight have you lost in how much time? I will start you on the treatment of SIBO, but meanwhile, we have to investigate and rule out other diagnoses whenever feasible for you. SIBO. CBC (complete blood count). C-reactive protein. TSH (thyroid-stimulating hormone). Stool routine, examination, and culture. Stool for fat content. Stool for reducing substances. Colonoscopy or Sigmoidoscopy if needed in the future. Pseudomembranous colitis. Tablet Rifaximine 550 mg thrice a day for 14 days, Mebeverine thrice a day. Oral rehydration solution. Exercise. After two weeks. </s>