Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs Small intestinal bacterial overgrowthUpdated: 2020-02-28OverviewIn small intestinal bacterial overgrowth, the bacteria consume nutrients normally absorbed into the body by the small intestine. Consequently, it may cause malnourishment. SymptomsSymptoms include abdominal bloating, pain, diarrhea and weight loss.TreatmentsTreatment may include antibiotics and nutritional support. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use