Small intestinal bacterial overgrowth (SIBO) occurs when an excessive amount of bacteria grows in the small intestine, leading to a range of digestive symptoms. These may include abdominal pain, bloating, diarrhea, constipation, and malabsorption of essential nutrients. Over time, this condition can result in nutritional deficiencies, weight loss, and fatigue, highlighting the importance of prompt diagnosis and effective treatment to restore gut health and overall well-being.