What Is IBS? (Irritable Bowel Syndrome)
What is IBS (Irritable Bowel Syndrome)? IBS is a common functional gastrointestinal disorder that affects gut–brain communication, leading to symptoms such as abdominal pain, bloating, diarrhea, constipation, or alternating bowel habits. This guide explains IBS symptoms, causes, diagnostic criteria, and treatment approach based on Rome IV guidelines, NEJM insights, and American College of Gastroenterology recommendations.