IBS for over 10yrs, no matter what I eat, I always have really bad smelling stools & gas. Its embarrassing. Help?

Consider SIBO. Fowl smelling stools and excess gas production could represent Small Intestinal Bacterial Overgrowth (SIBO). Patients with IBS may also suffer from SIBO. In my practice, I occasionally check for SIBO in patients with IBS and severe gas that are not responding well to traditional IBS treatments.