I am facing incomplete evacuation of bowels and irregular bowel movements for almost year now and I have undergone colonoscopy and CT abdominal scans. Everything is clear except Left inguinal hernia. I have taking IBS medication for quite long now and also changed diet but I am still having this issue. Is IBS the real reason behind it or could hernia cause these issues. Doctors saying it's ibs only causing these then why all kind pills and diet modifications not working. Please help me by providing some advice.