IBS — or irritable bowel syndrome — is one of the most common conditions in the world, yet doctors and patients alike are still confounded by what causes it and the best way to manage it. Ultimately, it’s only definition is its symptoms.
“IBS is a diagnosis of exclusion, so in order to label somebody as having IBS, you have to rule out other organic causes of their symptoms,” says Benjamin Cohen, MD, gastroenterologist at The Mount Sinai Hospital in New York City. “Only after you’ve shown that it’s not any of those things can you say that the symptoms are irritable bowel syndrome.”
Dr. Cohen is a gastroenterologist at The Mount Sinai Hospital in New York City.
References
Dsouza, R., et al. (2025). Colonoscopy. StatPearls.
National Institute of Diabetes and Digestive and Kidney Diseases. (2017). Diagnosis of irritable bowel syndrome.
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