How do I know if I have SIBO or IBS? You can't tell from symptoms alone - they overlap almost completely. IBS is a diagnosis of exclusion that describes a symptom pattern without identifying a cause. SIBO is a cause. Research suggests that up to 84% of people with an IBS diagnosis have SIBO as an underlying driver. If you have IBS and haven't been tested for SIBO, it's worth investigating. Testing is non-invasive and done at home. Can SIBO go away on its own? Occasionally symptoms fluctuate, but SIBO rarely resolves without treatment - particularly when there's an underlying driver like impaired…