as i suspected my breath test was positive.My GI sounded stumped,as he did not think i had sibo.He said sibo is usually caused by an underlaying disease.I have had so many tests though and no other disease has shown.He said SIBO happens when there is a motility issue.So I have no idea what this means....he wants me to do 10 days of xifaxan,but he did admit it tends to come back.Im so confused now as to what "underlaying disease" I might have?