What should I know about was ist ein reizdarm?

Irritable bowel syndrome (IBS) is a functional gut disorder with no organic cause, characterized by abdominal pain, bloating, and altered bowel habits. Diagnosis is by exclusion of other conditions (e.g., celiac disease, IBD). Causes are multifactorial: disrupted gut-brain axis, altered microbiota, food intolerances, and stress. Home gut tests may suggest patterns but are not diagnostic and often lack clinical validation. Genetic tests (e.g., TCF7L2, ADRB3) have no proven role in IBS management. Evidence-based approaches include medical evaluation, symptom diary, low-FODMAP diet, and stress reduction. Caution: Do not self-treat based on consumer tests alone. Evidence: practice/unclear.